Water test deals(Disclaimer)
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🏅 143 water tests in price comparison
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💶 Current offers and discounts
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🕝 Last updated on 13.10.2026
Lamotte Green Program Low Cost Water Monitoring Kit, Adults
The Earth Force Low Cost Water Monitoring Kit can be used to test fresh, brackish, or saline aquatic environments.
$ 55.97
free delivery
To the offer
Safe Home® DIY Bacteria in Water Test Kit – Results as Fast as 6 Hours – Detects 50 Different Species of Coliform Bacteria – EPA Lab Certified – Made in the USA – (4 Pack)
THE ORGINAL DIY BACTERIA TEST KIT that is certified accurate by Good Housekeeping Labs, American Red Cross Labs, Underwriter Labs, and Merck Labs. Designed and developed by our EPA certified scientists. Made in the USA.
$ 49.99
free delivery
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29% discount
API NITRITE TEST KIT 180-Test Freshwater and Saltwater Aquarium Test Kit
Contains one (1) API NITRITE TEST KIT 180-Test Freshwater and Saltwater Aquarium Test Kit, including 1 bottle of testing solution, 1 color card and 1 test tube with cap
$ 11.98
$ 16.78
To the offer
8% discount
16 in 1 Water Test Kit with 125 Test Strips for Home Water Quality Testing
【16-in-1 Water Test Kit】- With Umlecoa water quality test kit, you may know level of Water Hardness, Free Chlorine, Iron, Copper, Lead, Nitrate, Nitrite, Mps, Total Chlorine, Fluoride, Cyanuric Acid, Ammonia Chloride, Bromine, Total Alkalinity, Carbonate, pH easily. Covers main influencing factors which pollute your swimming pool ,hot tub or drinking water quality.
$ 11.99
$ 12.99
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Hydrosense PRO Ultra Legionella Water Test Kit - Single Use Testing Kit
Hydrosense
$ 132.70
free delivery
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ATI ICP Lab Analysis Pro for Reef Aquariums - Old Version - Advanced Water Testing with RO Water Analysis - Nitrate, KH & Fluoride - 1 Test Kit
Includes a Prepaid Label to Ship your Water in
$ 49.95
free delivery
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Safe Home DIY Bacteria in Water Test Kit (2 Pack)
THE ORGINAL DIY BACTERIA TEST KIT that is certified accurate by Good Housekeeping Labs, American Red Cross Labs, Underwriter Labs, and Merck Labs. Designed and developed by our EPA certified scientists. Made in the USA.
$ 26.99
free delivery
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Pawfly 5 in 1 Aquarium Water Master Test Kit, Fish Tank Water Testing Kit
5-in-1 Master Test Kit: Monitor all 5 critical water parameters – pH, nitrite, nitrate, ammonia, and phosphate – in one comprehensive aquarium test kit. The rigorous analysis helps you maintain an ideal haven for your aquatic friends
$ 31.99
free delivery
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Hydrosense ONE Ultra Legionella Water Test – Single-Test Kit
Ultra-Sensitive Detection – Detects Legionella pneumophila serogroup 1 at ≥100 CFU/L using a unique filter system, making it ideal for early detection in sensitive environments.
$ 120.81
free delivery
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API Freshwater Master Test Kit 800-Test Freshwater Aquarium Water Kit, White, Single, Multi-Colored
Contains one (1) API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, including 7 bottles of testing solutions, 1 color card and 4 tubes with cap
$ 35.98
free delivery
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11 in 1 - Aquarium Test Strips | 950 Tests - 150 Strips | Fish Tank Aquariums Water Test Kit & ebook | Aquarium Thermometer | Fish Tank Water Testing Kit Includes 50 Ammonia Strips | Versatile Usage
Home Aquarium Water Test Kit - Ensure the health of your fish with aquarium water testing kit & ammonia test strips for fish tank. This complete freshwater & saltwater tank test kit provides a reliable water tester for ammonia, pH, iron, chlorine, total hardness (GH), carbonate, nitrate, nitrite, total alkalinity, copper, and temperature, allowing you to have a complete understanding of your aquarium water quality. Trusted by fish enthusiasts, it adapts to your needs, making it an essential tool for aquarium care.
$ 22.99
free delivery
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Culligan Essential Water Lab Test Kit – Comprehensive Home Water Testing for Lead, Bacteria, Nitrates, pH, Hardness, Chlorine, Copper, Iron & More – Includes TDS Meter – Ideal for Tap & Well Water
COMPREHENSIVE HOME WATER TESTING KIT: Test for 10+ common contaminants including lead, bacteria, nitrates, nitrites, chlorine, copper, iron, pH, and hardness. Ensure your family's water is safe and clean.
$ 49.99
free delivery
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AAwipes Aquarium Ammonia Test Strips 8-in-1 |100 Strips | Quick & Accurate Water Testing for Freshwater & Saltwater Tanks -Test pH, Sodium Chloride, Alkalinity, Hardness, Chlorine etc. (K02-100)
Professional Quality Testing Kit: The AAwipes Aquarium test kit (100 strips) is developed by experts for fish enthusiasts. It offers 8-in-1 testing capabilities, made with high-quality fiber paper and non-bleeding colors. The kit measures key parameters like Free Chlorine, Nitrate, Nitrite, Hardness, Carbonate, Total Alkalinity, pH and Ammonia nitrogen.
$ 11.98
free delivery
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![JNW Direct Pond Water Test Kit for Ponds - 7 in 1 Test Strips [50 Pack]](https://cdn.netzshopping.de/productimages/X/C/S/B08CGNNSCX.jpg)
JNW Direct Pond Water Test Kit for Ponds - 7 in 1 Test Strips [50 Pack]
7-IN-1 POND TEST STRIPS: Keep your pond clear and your fish healthy with our 7-in-1 pond test kit. Test your pond water for hardness, carbonate chlorine, nitrite, free chlorine, pH, nitrate, and alkalinity
$ 13.99
free delivery
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ICP Water Test - Elemental Water Test Kit - 45 Elements - Reef Aquarium Test -ICP-OES - Saltwater Test Kit - Reef Tank Water Test
Comprehensive Testing - 45 elements currently tested
$ 44.95
free delivery
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Aquagenx Pinpoint Water Test Kit – Fast & Easy Water Testing Kit for E. coli Detection - No Lab or Equipment Needed - Ideal for Well, Tap, and Drinking Water Testing (2 Pack)
Aquagenx
$ 34.99
free delivery
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7 in 1 - Aquarium Test Strips | 100 Fast & Accurate Strips | Fish Tank Aquariums Water Test Kit & ebook | Aquarium Thermometer | Fish Tank Water Testing Kit for Fresh & Saltwater | Versatile Usage
HOME AQUARIUM WATER TEST KIT - Ensure the health of your fish with aquarium water test kit. This all-in-one fish tank water test kit provides a reliable water tester for pH, Chlorine, General Hardness, Carbonate Hardness, Nitrate, and Temperature, allowing you to understand your aquarium water quality completely.
$ 13.99
free delivery
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API Saltwater Master Test Kit 550-Test Saltwater Aquarium Water Test Kit
Contains one (1) API SALTWATER MASTER TEST KIT 550-Test Saltwater Aquarium Water Test Kit, including 6 bottles of testing solution, 1 color card and 4 test tubes with cap
$ 35.98
free delivery
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Triton Labs ICP-OES Water Test- Full Panel of 32 Elements - Saltwater Reef Testing Kit
Testing Elements Include: Na, Ca, Mg, K, Sr, B, Br, S, Li, Be, Ba, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Al, Si, As, Sb, Sn, Cd, Se, Mo, Hg, P (PO4), Pb, I.
$ 51.95
free delivery
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7% discount
API POND 5 IN 1 POND TEST STRIPS Pond Water Test Strips 25-Count
Contains one (1) API POND 5 IN 1 POND TEST STRIPS Pond Water Test Strips 25-Count
$ 13.94
$ 14.98
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Aquarium Test Strips for Freshwater Fish: 7 in 1 Fish Tank Water Testing Kit for Aquarium Pond - Accurate Testing Nitrate Nitrite Hardness Free Chlorine pH Carbonate Total Alkalinity-100 Strips
7-WAY AQUARIUM TEST KIT FRESH WATER : FUNSWTM aquarium testing strips can accurately test 7 essential water parameters in your aquarium, including nitrate nitrite hardness free chlorine pH carbonate and total alkalinity.
$ 11.99
free delivery
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AAwipes 8-in-1 Aquarium Test Kit (150 Strips) for Freshwater & Saltwater - Quick & Accurate Water Testing for Aquariums & Ponds. Tests Free Chlorine, Hardness, pH, Ammonia Nitrogen, etc. (K02-150)
Professional Quality Testing Kit: The AAwipes Aquarium test kit (150 Strips) is developed by experts for fish enthusiasts. It offers 8-in-1 testing capabilities, made with high-quality fiber paper and non-bleeding colors. The kit measures key parameters like Free Chlorine, Nitrate, Nitrite, Hardness, Carbonate, Total Alkalinity, pH and Ammonia nitrogen.
$ 14.98
free delivery
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Pawfly 6 in 1 Digital Water Testing Kit, 50 Strips Aquarium Water Test Kit
6-in-1 Fish Tank Water Test Kit: Accurately analyze 6 water parameters in one device – pH, nitrate (NO3), nitrite (NO2), chlorine (CL2), total hardness (GH), and carbonate (KH). Keep your aquarium water safe for all aquatic pets and plants
$ 125.99
free delivery
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Radon in Water Test Kit, Lab Analysis with Emailed Results in 1 Week
Safe and Easy to use with EPA approved lab methods
$ 49.99
free delivery
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AquaChek Ets Hach Company 562227 Phosphate Test Kit , White
The Test Gives Accurate Results After Only 60-Seconds, And Measures Phosphate From 0 To 1000 Parts Per Billion
$ 13.62
free delivery
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kactoily Digital Aquarium Water Tester with App Alerts
Ultimate Fish Tank Tracking: Kactoily smart aquarium monitor continuously monitors pH, ORP, EC, TDS, Salinity, SG, and Temp. Designed for both freshwater and marine setups, this all-in-one system replaces manual testing, ensuring your water chemistry is ideal for all fish species
$ 199.80
free delivery
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Lead in Water Test Kit, Lab Fee Included with Emailed Results
Safe and Easy to use with EPA approved lab methods
$ 45.99
free delivery
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Monitor DISSOLVED Oxygen Test KIT (60 Tests) - Monitor Aquarium and aquaculture Water Quality
Test dissolved oxygen level in water
$ 15.90
free delivery
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10 in 1 - Aquarium Test Strips | 100 Fast & Accurate Strips | Fish Tank Aquariums Water Test Kit & ebook | Aquarium Thermometer | Fish Tank Water Testing Kit for Fresh & Saltwater | Versatile Usage
SJ WAVE
$ 16.99
free delivery
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HYCHEK 12 in 1 Accurate Aquarium Test Kit, Fresh and Salt Water Test Strips
Upgraded 12-in-1 Aquarium Test Kit – This test kit allows you to test 12 key water parameters, including Ammonia, Phosphate, Iron, Copper, Nitrate, Nitrite, Total Hardness, Free Chlorine, Total Alkalinity, Carbonate, pH (Fresh Water), and pH (Salt Water). Gain a comprehensive understanding of your water quality and ensure the health and well-being of your fish. It meets daily testing needs and is an essential kit for home or aquarium use.
$ 24.99
free delivery
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175-Count 8-Way Aquarium Test Strips with Ammonia-Fish Tanks&Ponds
EXPERT WIDE-SPACING DESIGN – NO COLOR BLEED:6mm spacing between pads prevents color mixing for clean, reliable readings. Large color blocks and clear comparison chart allow fast, error-free interpretation. Lab-tested to ±3% accuracy—trust every result, every time
$ 11.76
free delivery
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DIY PurTest Bacteria Water Test Kit With Bacteria, Nitrate, Nitrite Tests - MADE IN USA
PurTest Bacteria Test Kit
$ 26.99
free delivery
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Pro-Lab Bacteria in Water Test Kit
COMPREHENSIVE WATER TESTING: Detects harmful bacteria in well, tap, and drinking water. Ideal for routine checks to ensure water safety for your home, aquarium, or laboratory use.
$ 14.30
free delivery
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API REEF MASTER TEST KIT Reef Aquarium Water Test Kit 1-Count
Contains one (1) API REEF MASTER TEST KIT Reef Aquarium Water Test Kit 1-Count, including 7 bottle of testing solution, 2 color cards and 4 test tubes with cap
$ 35.99
free delivery
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6% discount
Kactoily Smart Aquarium Monitor All in One pH/ORP/Salt/S.G/TDS/EC/Temp 24h Online Freshwater and Saltwater Fish Tank Tester (WiFi Version)
All-in-One Monitor: This versatile 7-in-1 aquarium pH monitor measures multiple water quality parameters including pH, TDS, EC, ORP, Specific Gravity, Salinity, and Temperature—all in a single unit. Easily track pH levels, temperature fluctuations, TDS levels, and conductivity in your water
$ 169.99
$ 179.99
To the offer
Osumex Heavy Metal Test General Kit for Humans 5 Pack - 8 Range Heavy Metal Urine Test Kits, Metal Testing Kit, Heavy Metal Testing Kit, Urine Metal Tester Heavy Metal Detection, Heavy Metals Test Kit
COMPREHENSIVE HEAVY METAL DETECTION: The Osumex heavy metal water test kit detects eight harmful metals, including Cadmium, Cobalt, Copper, Lead, Manganese, Mercury, Nickel, and Zinc. These metals are often found in heavy metals testing kit and pose serious health risks when consumed over time. Whether you’re using a well water test kit, tap water test kit, or testing environmental samples, our heavy metal water testing kit ensures your family's safety by identifying contaminants early.
$ 96.00
free delivery
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13% discount
Industrial Test Systems ITS Exact iDip 570 Marine Aquarium, Coral, & Aquaculture Water Starter Test Kit | Bluetooth | Waterproof | 7-Parameters | (486107-MA-K)
EASY TO USE: Incorporates the patented eXact Strip reagent delivery method and other advanced technologies that offer faster, safer, easier, and more precise water testing with a digital readout so no color matching required. Works in conjunction with the eXact iDip app for iOS and Android smart devices
$ 317.13
$ 365.81
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Aquarium Water Test Kit 9-in-1, Aquarium Ammonia Test Strips for Fish Tanks
COMPREHENSIVE AQUARIUM WATER TESTING: 9-in-1 water testing strips kit measures pH, total alkalinity, hardness, chlorine, nitrite, sulfate, copper, iron, and ammonia levels in your aquarium water
$ 11.49
free delivery
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HM Digital Single in-Line SM-1 TDS Monitor 0-9990 ppm
Range: 0-9990 ppm
$ 24.59
free delivery
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Pawfly 18 in 1 Drinking Water Test Kit, 125 Strips for Tap Water Well Swimming Pool Aquarium Spa, Home Water Quality Test Strips for pH Hardness Chlorine Lead Iron Copper Nitrate Fluoride & More
18 in 1 Water Test Kit: These water test strips are intended for testing 18 vital parameters in your drinking water, including pH, hardness, chlorine, lead, iron, carbonate, microorganisms, etc. Real-time detection to keep water clean and safe to drink or use.
$ 12.59
free delivery
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SaySummer Aquarium Test Strips for Fish Tank: 9 in 1 Aquarium Ammonia Test Strips for Fish Tank - 125 Counts Aquarium Water Test Kit Testing Ammonia Nitrogen, Copper, pH and More
Complete Aquarium Water Test Kit: Our fish tank test strips transform complex professional testing into a simple, user-friendly solution. This comprehensive fish tank kit measures 9 crucial elements: Ammonia Nitrogen, Copper, Nitrate, Nitrite, pH, Free Chlorine, Hardness (GH), Carbonate (KH), and Total Alkalinity. By ensuring substances affecting fish health stay below safe levels, stabilizing pH, and maintaining buffering capacity, it fosters a healthy, stable aquatic environment.
$ 13.99
free delivery
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kactoily Long-Range WiFi Aquarium Water Quality Monitor – 7 Parameter Digital Aquarium Water Tester for pH ORP EC TDS Salinity SG Temp, Freshwater & Saltwater Tanks
24/7 Real-Time Monitoring & Alerts: Monitor pH, salinity, Temp, TDS and 3 parameters via kactoily app. Set custom ranges for each value and receive instant app alerts when levels go out of range. Never miss critical changes in your aquarium
$ 229.80
free delivery
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Monitor Alkalinity Test KIT (120 Tests) - Monitor Aquarium and aquaculture Water Quality
Test the alkalinity level in water
$ 12.90
free delivery
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Salifert Master Reef Testing Combo Kit - Saltwater Aquariums
Six Salifert Professional Test Kits
$ 94.36
free delivery
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14% discount
DaToo Aquarium Master Test Kit 5 in 1 Fish Tank Water Master Test Kit for pH Ammonia Nitrite Nitrate Phosphate High Accuracy Aquarium Water Testing Kit for Freshwater and Saltwater Tanks
【DaToo Master-level Testing Kit】: Harmful substances such as ammonia and nitrite in water bodies are invisible to the naked eye. Their continuous accumulation can disrupt the physiological state of fish, causing stress, diseases, and even death. Water quality control is the core aspect of fish breeding. Regularized testing can promptly identify hidden risks and intervene in water quality issues in advance, safeguarding the survival and health of aquatic organisms at their source.
$ 17.79
$ 20.79
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kactoily Smart Aquarium Water Monitor, Salinity pH ORP TDS EC Temp Multi-Parameter Tester for Freshwater Saltwater Fish Tanks Real-Time Alerts Upgraded Version
24/7 Real-Time Monitoring & Alerts: Monitor pH, salinity, Temp, TDS and 3 parameters via app. Set custom ranges for each value and receive instant SMS/app alerts when levels go out of range. Never miss critical changes in your aquarium
$ 179.99
free delivery
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Fluval Master Test Kit for Aquarium Water
Offers essential testing of pH, Ammonia, Nitrite and Nitrate
$ 49.89
free delivery
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MOLLIFII Water Test Education Kit, Turbidity, 5887-A
Water Test Education Kit, Turbidity
$ 73.99
free delivery
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9-In-1 Aquarium Test Strips – 100 Strips for Freshwater & Saltwater | Tests pH, Nitrate, Nitrite, Hardness, Chlorine, Copper, Iron, Carbonate & Alkalinity | Fast Results for Fish Tank & Reef Aquariums
TEST 9 PARAMETERS IN ONE DIP – RESULTS IN 60 SECONDS — No guesswork, no complicated kits. Simply dip the strip, hold it horizontally for 60 seconds, and compare to the color chart. Instantly know your pH, Nitrate, Nitrite, Total Hardness, Free Chlorine, Copper, Iron, Carbonate, and Total Alkalinity — everything your fish need to thrive, in one simple step.
$ 11.99
free delivery
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Agriculture Solutions Salinity Refractometer for Seawater and Marine Fishkeeping Aquarium 0-100 PPT with Automatic Temperature Compensation
Measure salt water or salinity of water, ideal for aquariums and marine monitoring.
$ 17.99
free delivery
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Pro Products Water Test Kit #2401
Pro Products
$ 165.34
free delivery
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HI98121 Hanna pH ORP Temperature Combo Water Tester - Checker
The Hanna HI98121 is an ultra-low range nitrite checker that utilizes ultraviolet radiation to accurately measure nitrite levels.
$ 239.00
free delivery
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6% discount
ICP-OES Triton 4 Pack Reef Seawater Analysis Test Kit
4 x TRITON ICP-OES Test Kits
$ 179.00
$ 189.99
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11 in 1 Aquarium Water Test Strips with Ammonia,125 ct Fish Tank Test Kit
11 Essential Parameters Aquarium Tests: Easily monitor 11 vital parameters of your aquatic water: pH, Total Alkalinity, Carbonate (KH), Total Hardness (GH), Total Chlorine, Sodium Chlorine, Iron, Copper, Nitrate, Nitrite, and Ammonia Nitrogen
$ 17.99
free delivery
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Mavdecll 3-in-1 Water Quality Tester, 0-9990 PPM Water TDS Meter, TDS, EC and Temperature Meter, LCD Screen with Backlit, for Aquariums, Pools, Drinking Water and Hydroponics
√ This smart monitor combines 3 basic functions to accurately measure TDS, EC and temperature. Comprehensive water quality measurement to ensure healthy water quality
$ 33.29
free delivery
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API Phosphate Test Kit For Freshwater And Saltwater, 64 OUNCES
Contains one (1) API PHOSPHATE TEST KIT 150-Test Freshwater and Saltwater Aquarium Water Test Kit, including 2 bottles of testing solution, 2 color cards and 1 test tube with cap
$ 14.99
To the offer
Aquagenx Pinpoint Water Test Kit – Fast & Easy Water Testing Kit for E. coli Detection - No Lab or Equipment Needed - Ideal for Well, Tap, and Drinking Water Testing (5 Pack)
Fast & Reliable - Detect E. coli in water within 20-24 hours without lab testing. Get clear, accurate results quickly for safe drinking water.
$ 82.99
free delivery
To the offer
19% discount
Salifert Iodine Test Kit - 40 Tests
Iodine is present in natural sea water in a very low concentration (0.6 mg/L or 0.06 PPM) and this i
$ 26.68
$ 33.03
To the offer
17% discount
Aqueon 7-in-1 Aquarium Test Strips, Fast Results for pH, Total Alkalinity, Hardness, Nitrate, Nitrite, Free Chlorine and Iron Levels, for Freshwater and Saltwater, 50 Count
ALL-IN-ONE TESTING to check pH, total alkalinity, hardness, nitrate, nitrite, free chlorine, and iron levels to protect fish.
$ 14.95
$ 17.99
To the offer
Advatec Master Test Strip Kit - for Freshwater, Saltwater & Reef Aquariums, Test for 11 Parameters! -Fast Lab-Grade Results with Interpretation Guide! (100 Ct. - 300 Strips, 1,100 Tests)
Must Have For All Aquariums - Protect your fish by ensuring their environment is free of any harmful chemicals.
$ 59.99
free delivery
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AAwipes Ammonia Test Strips for Fish Tank Aquarium Test Strips Aquarium Water Test Kit Freshwater Fish Tank (100)
Precise Ammonia Monitoring: AAwipes ammonia test strips provide accurate and reliable results, empowering you to monitor ammonia levels with confidence. Regular testing helps prevent harmful ammonia spikes that can jeopardize the health of your fish and aquatic inhabitants. Identify potential issues early and take corrective actions before they escalate.
$ 13.98
free delivery
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Digital Salinity Meter 3-in-1 Saltwater Tester – Specific Gravity, Salinity & Temperature Pen Hydrometer, High Accuracy Water Quality Tester for Aquarium, Marine, Pool, Hydroponics, Aquaculture
Smart & Easy to Use – Backlit LCD screen for clear readings, automatic temperature compensation (ATC), and audible beeps at the start and finish of testing. Designed for quick, hassle-free measurements.
$ 49.99
free delivery
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Professional Lead In Water Test Kit Clamshell
$ 20.11
free delivery
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All-New 4 in 1 Digital TDS Meter Water Tester – Portable Multi-Function Tester for Drinking Water, Aquarium, Fish Tank, Pool, Pure Water Quality (White)
Upgrade Your Water Quality Testing with Our 4-in-1 TDS Meter. Featuring an Intelligent Display Screen and Automatic Lock for Easy Value Detection. Enjoy Hassle-Free Operation with Auto Shutdown in 2 Minutes for Energy Efficiency. Ideal for Home, Aquariums, and Hydroponics. Get Accurate Readings Effortlessly!
$ 46.98
free delivery
To the offer
Phosphate Test Strips for Freshwater & Saltwater Fish Tank - Testing Strips for Fresh & Salt Water Aquarium - Lab Grade Water Tester Kit - 25 Count
Weekly Phosphate Monitoring: Regular testing of water parameters with Phosphate Test Strips helps detect invisible water problems, preventing issues like Cyanobacteria blooms, inhibiting coral calcification, and ensuring the health of fish.
$ 23.99
free delivery
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LaMotte 3110-01 Nitrate Nitrogen Test Kit, 0.25-10.0ppm Range
Test kit uses cadmium reduction method for determining nitrate-nitrogen levels in water samples
$ 99.60
free delivery
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5 in 1 Aquarium Test Strips Kit for Freshwater & Saltwater - Water Fish Tank Tester for pH, Carbonate, General Hardness, Nitrite & Nitrate - 25 Count
Comprehensive Water Monitoring: The 5 in 1 Test Strips provide a holistic approach to aquarium care by covering crucial indicators like pH, Carbonate, General Hardness, Nitrite, and Nitrate. Regular testing with these LAB-grade strips ensures a thorough examination of water parameters for optimal aquatic conditions.
$ 18.99
free delivery
To the offer
Fritz 6 in 1 Aquarium Test Strips - Monitor Nitrates, Nitrites, Water Hardness, Chlorine, Alkalinity and pH Level - 100 Count
Comprehensive Testing: Ensure the health of your aquarium with complete monitoring of nitrates, nitrites, water hardness, chlorine, alkalinity, and pH levels.
$ 19.99
free delivery
To the offer
Hohopeti Dual Backlight Water Testing Pen Portable Water Analyzer Hydroponics and Aquariums Accurate EC and Temperature Meter 1 Piece
Functionality: combines water detection, ec and temperature water testing, and backlight features, offering a versatile solution for comprehensive water analysis,water quality tester,portable water quality meter
$ 15.39
free delivery
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Salifert Phosphate Test Kit
The phosphate test kit will detect lower concentrations of phosphates
$ 19.61
free delivery
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Malida Stainless Water Pressure Test Gauge, Water Pressure Detector for Aquarium Meter 0-1.6MPa 0-220psi Reverse Osmosis System Pump with 1/4.
Water Pressure test Gauge with fittings for connection to 1/4"OD tube
$ 11.78
free delivery
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Pawfly 5 in 1 Aquarium Water Master Test Kit for Freshwater & Saltwater
5-in-1 Master Test Kit: Monitor all 5 critical water parameters – pH, nitrite, nitrate, ammonia, and phosphate – in one comprehensive aquarium test kit. The rigorous analysis helps you maintain an ideal haven for your aquatic friends
$ 37.99
free delivery
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80093 Freshwater Phosphate Test Strips
Provides quick and reliable water test results.
$ 19.95
free delivery
To the offer
Essentials Pro ATI ICP-OES 2026 Complete Saltwater Water Test Kit with PREPAID Shipping Label Coral Aquarium Fish Food (Two ATI ICP Test Kits)
Essentials Pro
$ 99.90
free delivery
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GAOQSEMG Aquarium Water Test Kit 11 in 1,100 Counts Ammonia Aquarium Test Kits Fish Tank Test Strips Freshwater & Saltwater pH Testing Strips for Ammonia,
Comprehensive 11-in-1 Testing:This complete freshwater & saltwater tank test kit provides a reliable water tester For Ammonia(NH3/NH4+) , hardness (GH), pH(Freshwater), pH(Saltwater), free chlorine (CL2), carbonate (KH), nitrite (NO2), nitrate (NO3), alkalinity (TA), copper (Cu), iron (Fe) .
$ 17.99
free delivery
To the offer
WLR Industries Hanna HI718 Checker Saltwater Aquarium Iodine Colorimeter -Water Tester
Hanna HI718 - Iodine Water Tester is designed for direct measurement
$ 84.99
free delivery
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Arsenic 481298 Econo-Quick Test Kit, 300 Tests
Arsenic
$ 201.52
free delivery
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YINMIK pH Meter Salinity Tester pH Salt Meter with pH Salt Solution
Digital pH Salt Tester for Saltwater Aquarium: YINMIK Salinity and pH detector is designed for saltwater aquarium and reef tank, accurately reading the acidity alkalinity and salinity of marine fish tank. Ideal saltwater fish tank pH: 8.0-8.5; salt: 32-35ppt. Portable pH and salt monitor for planted aquarium beginner. The pH salinity meter will help you maintain the health of fish, and take care of tank plant and cleaning assistants (such as Astrea, Trochus, Nassarius snails or starfish etc.).
$ 19.99
free delivery
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Aquarium Test Strips for Fish Tank: 9 in 1 Aquarium Water Test Kit for Freshwater - 150ct Fish Test Strips Testing Ammonia pH Nitrate Chlorine Nitrite Hardness Alkalinity Copper
Comprehensive 9-in-1 Test Strips: FUNSWTM aquarium test strips accurately test 9 essential water parameters including Ammonia, pH, Nitrate, Chlorine, Nitrite, Hardness, Alkalinity, and Copper for both freshwater and saltwater aquariums.
$ 15.99
free delivery
To the offer
11 in 1 Aquarium Test Strips Kit | Aquarium Ammonia Test Strips | 150 Strips | Quick Accurate Freshwater&Saltwater Fish Tank Water Test Kit for Ammonia,pH,Nitrate,Nitrite,Hardness,Chlorine,Carbonate
11-in-1 Comprehensive Aquarium Water Testing: Our aquarium test strips cover 11 essential parameters (pH, Ammonia, Nitrate, Nitrite, Total Alkalinity, Carbonate, Hardness, Total Chlorine, Copper, Iron, Temperature). Unlike most aquarium water test kits with 6-10 tests, our fish tank test kit delivers full-spectrum monitoring—ideal for both freshwater and saltwater setups. A top choice for users seeking aquarium test strips with expanded functionality.
$ 18.80
free delivery
To the offer
Triton Labs ICP-OES Water Test- Full Panel of 32 Elements
Saltwater reef Testing Kit.
$ 49.99
free delivery
To the offer
14% discount
Luxshiny Portable Water Tester Ec Meter with Dual Backlight Display for Accurate Water Quality and Temperature Measurement Aquarium and Drinking Use
Luxshiny
$ 14.19
$ 16.59
To the offer
SaySummer Aquarium Test Strips for Saltwater Tank: 10-in-1 125 Counts Salt Water Aquarium Water Test Kit, Fish Tank Test Strips for Testing Salt Chlorine Copper Nitrate pH and More, AQSTTN24
Saltwater Aquarium Testing Kit: The 10-in-1 aquarium test kit is specially designed to include salt testing (0-8000 ppm), providing information about 10 parameters in one dip: Iron (Fe), Copper (Cu), Nitrate (NO3), Nitrite (NO2), Chlorine (Cl2), Total Hardness (GH), Total Alkalinity (TAL), Carbonate (KH), pH, and Salt.
$ 15.99
free delivery
To the offer
Seachem MultiTest: Iron 75 Tests
Measures iron to less than 0.05 mg/L
$ 22.14
To the offer
Red Sea Reef Foundation Pro Test Kit - Accurate Calcium, Alkalinity & Magnesium Testing for Saltwater Aquariums - 75 Tests, Easy-to-Use
Saltwater Reef Foundation Pro Multi Test Kit
$ 87.99
free delivery
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9-in-1 Aquarium Water Test Kit - 100 Freshwater & Saltwater Test Strips | Fish Tank Kit for pH, Nitrate, Nitrite, Hardness, Chlorine, Iron, Copper, Alkalinity, Carbonate | Quick & Reliable Results
9-IN-1 AQUARIUM TEST STRIPS: Test 9 critical water parameters in one simple step, including Iron, Copper, Nitrate, Nitrite, Chlorine, pH, Total Hardness, Carbonate Hardness, and Total Alkalinity. Perfect for both freshwater and saltwater aquariums, it provides a complete understanding of your water quality.
$ 13.99
free delivery
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Dissolved Oxygen Meter Data Logger DO Meter with Electrode Portable Digital DO & Temperature Tester with 99 Groups Recording, Dissolved Oxygen Meter Analyzer for Aquarium/Hydroponics/Ponds/Water/Home
【High Accuracy】:This Dissolved Oxygen Meter is high performance, high accuracy with -1.5%/+1.5% of readings that offer the most cost-effective oxygen electrode
$ 179.00
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Digital Dissolved Oxygen Meter DO Tester with ATC, 9.84ft DO Probe Cable, Portable Dissolved Oxygen Test Kit for Aquarium, Ponds, Hydroponics, Fish Tank, Brewing, Water Quality, Range 0.0-40.0 mg/L
Portable DO Meter with Dual Display (mg/L & % Modes):This digital dissolved oxygen meter offers mg/L and % saturation modes for flexible measurement. Ideal dissolved oxygen tester for aquarium, fish tank, ponds, brewing, hydroponics, and water analysis. It accurately detects oxygen content in water (1 mg/L = 1 ppm), helping maintain optimal oxygen levels for aquatic life and fermentation. Suitable for koi ponds, aquaculture, wastewater treatment, and environmental testing.
$ 80.68
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Pawfly Aquarium pH Test Kit, Accurate Fish Tank pH Testing Kit
Essential pH Test Kit: Include a liquid reagent dropper bottle, test tube, and easy-to-read color chart for accurate aquarium pH testing. Monitor water conditions with ease and maintain proper pH levels to support healthy fish and other aquatic life
$ 11.99
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8-in-1 Water Quality Tester - S.G, EC, Salt, ORP, CF, Temp - Online Monitor for Aquariums, Hydroponics, and Labs
24/7 Mobile App Monitoring: Monitor your water quality anytime, anywhere with our user-friendly app, compatible with both iOS and Android devices.
$ 90.69
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AUTOUTLET Refractometer Saltwater Aquarium for Seawater,Pool,Tank,Testing,Marine Fishkeeping, 0-100PPT & 1.000-1.070 Salinity Tester with ATC Function Hydrometer Specific Gravity Salinity Meter Kit
【AUTOUTLET Salinity Refractometer】This salinity tester is used to measure salinity of brine/seawater, monitor and control the concentration of saltwater. Ideal for aquariums and marine applications.
$ 16.99
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Wutest 9 in 1 Aquarium Test Strips 150 Aquarium Test Kit Fish Tank Test Kit
150 Count 9 in 1 Aquarium Test Strips - Wutest aquarium testing strip tests the most important 9 parameters in just one test strip - Iron (Fe), Copper (Cu), Nitrate (NO3), Nitrite (NO2), Chlorine (Cl2), Total Hardness (GH), Total Alkalinity (TAL), Carbonate (KH), pH. Allowing you to have a complete understanding of your aquarium water quality
$ 13.99
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ProTech 300 & ProTech 300 Water Treatment Test Kit with Rust Inhibitor for Outdoor Wood Boiler
This kit was designed to protect your Outdoor Wood Boiler Stove investment.
$ 89.99
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7% discount
LOHAND Digital Salinity Meter, Range:0-50ppt, 1.000～1.037 Specific Gravity
LOHAND
$ 49.99
$ 53.99
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Hallocool Salinity Refractometer for Aquarium Seawater Marine Fishkeeping
MEASURES ON 2 SCALES - Aquarium Refractometer features specific gravity (D20/20) 1.000-1.070 and parts per thousand 0~100‰ , allow to get two results in different units by one test
$ 16.55
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Mavaol 8 in 1 Water Quality Tester, pH EC TDS ORP SG Salt CF Temperature,
Comprehensive 8-in-1 Water Quality Monitoring – Test pH, EC, TDS, ORP, S.G, SALT, CF, and temperature all in one device for a complete water quality analysis, Suitable for aquariums, hydroponics, and pools.
$ 106.99
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ATI ICP Lab Analysis Ultimate-MS for Reef Aquariums - Hybrid ICP-OES/ICP-MS with Dual Validation - Most Comprehensive - 1 Test Kit
Ultimate-MS Hybrid Analysis: Combines ICP-OES and ICP-MS for dual validation with the lowest detection limits available in reef water testing.
$ 69.95
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Pawfly 100 Pcs Aquarium Test Strips 6 in 1 Digital Water Testing Kit, Fish Tank Testing Strips for pH Nitrate Nitrite Chlorine Total Hardness & Carbonate, Fresh/Salt Aquarium Water Test Kit
Aquarium Test Strips: Official Refills for the Pawfly 6-in-1 Digital Water Testing Kit (Not Included). Professionally test 6 key parameters – pH, nitrate (NO3), nitrite (NO2), chlorine (CL2), total hardness (GH), and carbonate (KH)
$ 13.99
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ATI ICP Lab Analysis Pro for Reef Aquariums - Advanced Water Testing with RO Water Analysis - Nitrate, KH & Fluoride - 1 Test Kit
Pro Analysis: Includes full Standard scope plus nitrate, fluoride, carbonate hardness (KH), and a separate RO/DI water analysis.
$ 49.95
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Aqueon Ammonia Aquarium Test Strips, Freshwater and Saltwater Aquariums, 50 Count
ALL-IN-ONE SOLUTION: Aqueon Ammonia Aquarium Test Strips keep your aquarium water crystal-clear and your pet fish safe.
$ 16.99
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Hach Total Alkalinity Test Strips, 0-240 mg/L, 50 Tests, 2744850
Easy to use, disposable, and inexpensive
$ 26.89
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Tetra EasyStrips 6-in-1 Aquarium Water Test Strips, 100 Count
COMPLETE TESTING: Regularly testing your water levels is critical to the success of your aquarium.
$ 32.97
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JBL ProScan Recharge, Refill Test Strips for Analysis via Smartphone for Freshwater Aquariums
Quick and Easy
$ 25.25
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API Replacement Test Tubes for Aquarium Test Kits 6 Pack Bundle
API
$ 14.98
free delivery
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Tetra EasyStrips Ammonia Test Strips for Aquarium Water, 100 Count
AMMONIA TESTING: Regularly testing your water ammonia levels is critical to the success of your aquarium.
$ 15.97
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NJBVRS YY-400 Hydrogen Concentration Water Quality Test Pen PH/ORP/H2 TEM 4in1 Digital Water Meter
1. **Portable Design**: Our water quality tester features a pen-style design that makes it easy to carry and use anywhere, ensuring you have the tools you need for on-the-go testing of water quality.
$ 28.00
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Monitor Dissolved Oxygen Test Kit (60 Tests), 3 pcs. - Monitor Aquarium and aquaculture Water Quality
Test dissolved oxygen level in water
$ 40.90
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API Ammonia 130-Test Freshwater and Saltwater Aquarium Water Test Kit
Contains one (1) API AMMONIA 130-Test Freshwater and Saltwater Aquarium Water Test Kit, including 2 bottles of testing solution, 2 color cards and 1 test tube with cap
$ 15.48
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API POND MASTER TEST KIT Pond Water Test Kit 500-Test
Contains one (1) API POND MASTER TEST KIT Pond Water Test Kit 500-Test, including 6 bottles of testing solution, 3 color cards and 4 test tubes with cap
$ 34.98
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Monitor Ammonia Test KIT (150 Tests) - Monitor Aquarium and aquaculture Water Quality
Test Determine ammonia (NH3) and ammonium ion (NH4) level in water
$ 14.40
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Essentials Pro ATI ICP-OES 2026 Complete Saltwater Water Test Kit with PREPAID Shipping Label Coral Aquarium Fish Food (Three ATI ICP Test Kits)
Essentials Pro
$ 137.74
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5-in-1 Water Quality Multi-Parameter PH EC CF TDS (ppm) Temperature Test Meter Backlight, Wall-mountable Rechargeable Continuous Monitor Tester, Aquariums Hydroponics Pool Fish Tank Pond Drinking
Measure 5 parameters, continuously monitoring shows readings on its large-screen triple display with backlight. Powered by its rechargeable battery (installed in the main unit) or the power adapter included which supports a long period of monitoring.
$ 69.99
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Monitor Chlorine Test KIT (250 Tests) - Monitor Aquarium and aquaculture Water Quality
Test the free chlorine level in water
$ 12.90
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API pH TEST & ADJUSTER KIT 250-Test Freshwater Aquarium Water pH Test and Adjuster Kit
Contains one (1) API pH TEST & ADJUSTER KIT 250-Test Freshwater Aquarium Water pH Test and Adjuster Kit, including 1 bottle of testing solution, 2 bottles of pH adjuster, 1 color card and 1 test tube with cap
$ 18.48
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Water Testing Strips Water Test Strips 100PCS/Set 15 in 1 Fast Testing for Drinking Replacement Vc Resistant Kit
Convenient Storage and Retrieval: Our water tester for drinking water come with size tubes for convenient storage and retrieval, ensuring that they are easy to use and maintain their performance. Water Testing Strips
$ 14.59
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API Copper Test KIT 90-Test Aquarium Water Test Kit
Contains one (1) API COPPER TEST KIT 90-Test Aquarium Water Test Kit, including 1 bottle of testing solution, 1 color card and 1 test tube with cap
$ 15.49
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7% discount
Detekt RV Freshwater Test Bacteria/Mold, Camper Water Filter Test (USA)
EASY, FAST, & SIMPLE: Get initial results under 5 minutes and visual growth results in 72 hours.
$ 25.99
$ 27.99
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API CALCIUM TEST KIT Saltwater Aquarium Water 1-Count Test Kit
Contains one (1) API CALCIUM TEST KIT Saltwater Aquarium Water 1-Count Test Kit, including 2 bottles of testing solution and 1 test tube with cap
$ 13.79
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Pawfly 21 in 1 Drinking Water Test Kit, 125 Strips for Tap Water Well Swimming Pool Aquarium Spa, Home Water Quality Test Strips for pH Hardness Chlorine Lead Iron Copper Nitrate Fluoride & More
21 in 1 Water Test Kit: These water test strips are intended for testing 21 vital parameters in your drinking water, including pH, hardness, chlorine, lead, iron, carbonate, microorganisms, etc. Real-time detection to keep water clean and safe for drinking or use.
$ 12.59
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Saltwater Meter Salinity Meter Digital Water Tester Hydrometer Ideal for Hydroponics Aquarium Fish Pond Aquaculture High Accuracy Pen Type Meter Specific Gravity(SG) Salinity and Temperature 3 in 1
No more one eye closed and put another eye on eyepiece. Easy use.
$ 49.99
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Monitor Calcium/Magnesium Low Salinity (0-5 PPT) Test KIT (120 Tests) - Monitor Aquarium and aquaculture Water Quality
Test calcium (Ca) and magnesium (Mg) level in water. Suitable for freshwater and brackish water with the salinity between 0 - 5 part per thousand (ppt).
$ 18.90
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7% discount
GIDIGI Aquarium Salinity pH Meter,Digital Pool Salt Tester
5-In-1 Saltwater Aquarium Test Kit for Fish Lover: To raise fish, you must first raise water quality. It is very necessary to regularly test the water quality of the aquarium.GIDIGI fish tank tester can detect salinity, pH, EC, TDS and TEMP at one time, helping you to keep track of slight changes in water quality at any time and provide a stable growth environment for fish.Whether it is a saltwater/freshwater fish tank, pond or aquaculture, this tester is an excellent solution
$ 13.99
$ 14.99
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Digital Salinity Tester Pool Saltwater Tester pH and Salt Meter
6 IN 1 Water Tester - Salinity tester: PPM+ PPT+%. 1. For Swimming Pool Slat Testing: 0-9,999ppm (TDS meter), 2. Seawater Test: 0-9,999ppm/10-200ppt, 3. For Food Testing: 0.01%-25%. 4. PH meter measuring 0.00-14pH, 5. EC Meter: 0-9,999us/cm (10-400ms/cm) for Irrigation & Planting, 6. Temperature Measuring 32-140°F
$ 34.99
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Hach DPD Total Chlorine Reagent Powder Pillows, 10 mL, Pack of 100, 2105669
USEPA ACCEPTED – Approved for chlorine reporting in drinking water and wastewater analysis using Hach Method 8167.
$ 33.15
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hygger Pool Salt Tester & PH Meter, 5-in-1 Digital Pool Water Tester, High Accuracy Salinity PH Temp EC and TDS Saltwater Pool Test Kit for Aquarium Swimming Pool Hot Tub and Swim Spas
Application: As a tool to improve the quality of life, this pH/TDS meter can help you find out quality water value. It can be used to test drinking water, swimming pools, PH balance in aquarium, RO system, spa or hydroponics. Basically all the environments that need to test PH value can use this tester to get accurate data
$ 28.99
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ORAPXI pH Meter Salinity Tester for Saltwater Aquarium Simultaneous Display of pH Salt for Saltwater Pool Update Aquarium pH Tester pH and Salt Meter for Saltwater Aquarium Reef Tanks Koi Pond
[Upgraded Salinity Function] Most marine organisms can tolerate salinity in the range of 30-38 ppt, maintaining salinity at 33-35 ppt provides optimal conditions for the growth of animals in the aquarium. The meter features an enhanced salinity sensor for exceptional accuracy, allowing you to maintain optimal salt levels with confidence.
$ 26.99
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TIDTALEO Portable Water Tester Digital Water Quality with High Precision Sensor for Accurate Measurement Pools Aquariums User Friendly Travel Friendly Design
Highprecision sensor: features a highprecision sensor that ensures accurate and consistent water quality readings every time you use it,ph tester pen,digital water quality meter
$ 12.19
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VILLNO 9 in 1 Aquarium Test Strips, 120ct Fish Tank Water Testing Kit
【9-in-1 Aquarium Test Kit】: This aquarium test kit accurately measures 9 essential water parameters—Fe, Cu, Nitrate, Nitrite, Chlorine, GH, Alkalinity, Carbonate, and pH—helping you maintain a balanced and healthy aquatic environment.
$ 13.99
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16 in 1 Drinking Water Test Kit Water Tester for Drinking Water
1、Best Choice16 in 1 drinking water test kit detects total hardness, free chlorine, iron, total chlorine, tin, nitrite, zinc, copper, cobalt, nickel, sodium chloride, total alkalinity, pH, sulfate, nitrite, nitrate. Comprehensive water testing for drinking water, tap water, well water and aquarium.
$ 18.99
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YINMIK Food Salt Meter Sodium Tester for Water Digital Salt Tester for Food
YINMIK Food Salinity Meter - The YINMIK salt meter is a salinity test tool specifically designed to test the salinity levels of food. Whether you're a cook checking the salt levels during food preparation or someone trying to control your salt intake and protect your health, the YINMIK salt meter is your best salt reader. Additionally, it can monitor the salinity of saltwater pools.
$ 39.99
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Aquarium Test Strips,100 Strips 9 in1 Saltwater and Freshwater Aquarium Test Kit for Aquarium,Pond and Fish tank,Testing Carbonate,Alkalinity,pH,Hardness,Free Chlorine,Nitrate,Nitrite,copper and Iron.
9-in-1 aquarium test kits- featuring aquarium test strips, simplifies water testing for freshwater and saltwater setups by covering the most important parameters: Iron, Copper, Nitrate, Nitrite, Chlorine, Total Hardness, Total Alkalinity, Carbonate, and pH. This ensures optimal conditions for your fish tank.
$ 12.99
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CoralVue ABC Automated Testing Reagents (6 Month Supply)
The CoralVue ABC Automated Testing Reagents are for the analysis of alkalinity, calcium, and magnesium levels. It can be used to manually test levels of kH, Ca, and Mg of aquarium water.
$ 79.99
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E. Coli and Coliform Test Kit in Water 1 PK (3 Bus. Days) Schneider Labs
SLGi Home Test Kits includes sampling tools, a prepaid return shipping label, instructions, and analysis.
$ 70.00
free delivery
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Innovating Science -Water Hardness Testing Kit IS9751
Use to determine hardness of fresh water sample
$ 65.85
free delivery
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DIY PurTest Bacteria Water Test Kits (x2) With Bacteria, Nitrate, Nitrite Tests - MADE IN USA
(2)PurTest Bacteria Test Kits
$ 49.99
free delivery
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Hanna Instruments HI782-25 Marine Nitrate High Range Checker Reagents (25 Tests)
Pre-made reagents for ease of use
$ 39.99
free delivery
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Seachem Ammonia Alert 1 Year Monitor (3 Pack)
Seachem sensor technology
$ 22.50
free delivery
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Agamino Aquarium Test Kit Holder Compatible with API Freshwater Master Test Kit, Aquarium Water Testing Station & Organizer with 6 Test Tube Slots, 9 Bottle Storage, Color Chart Slot, Drying Rack
Keep Your Aquarium Testing Tools Organized: Designed to help organize your aquarium water testing routine, this holder features 6 dedicated tube slots and a rear storage compartment that accommodates up to 9 standard reagent bottles. Keep test tubes, bottles, and reference materials neatly arranged in one convenient location for easier access during testing.
$ 18.99
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Industrial Test Systems 481046 SenSafe® Ida's Iron Test, Fe+2
EASY TO USE: Single dip and read test strip procedure and optimized color chart make the product ideal for technical and non technical users alike for detection of Iron in water
$ 17.13
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Seachem MultiTest: Ammonia 75 Tests
Measures total and free ammonia down to less than 0.05 mg/L
$ 22.14
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Industrial Test Systems Eco-Check 5 in1 Aquarium Water Quality Test Strips 481345 - Made in USA - Best Pond & Aquarium Test Strips
EASY TO USE: Single dip and read test strip procedure and optimized color chart make the product ideal for technical and non technical users alike for detection of 5 water quality parameters in water
$ 17.58
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API Replacement Plastic Test Tubes with CAPS for Any Aquarium Test Kit Including API Freshwater Master Test Kit 24-Count Box
Contains one (1) API REPLACEMENT TEST TUBES WITH CAPS For Any Aquarium Test Kit Including API Freshwater Master Test Kit 24-Count Box
$ 24.95
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Salifert Magnesium (MG) Test Kit
The magnesium test kit effectively tests and provides a balanced magnesium aquarium
$ 19.61
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We have found a total of 143 water tests deals for you at amazon, Chewy.com, PetSmart, and other shops. The most popular brands are: API, Generic, and Pawfly. Today's offer is API NITRITE TEST KIT 180-Test Freshwater and Saltwater Aquarium Test Kit with 29% discount. The lowest price we found in our deals is $ 11.49 . The highest price in our price comparison is $ 317.13 . Currently, we have selected 10 reliable shops for you to buy water tests affordably.