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$32.96
$35.60
API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-Colored
Amazon.com
$32.96
$35.60
API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-Colored
Amazon.com
$12.98
Aquarium Test Strips For Freshwater Fish: 7 in 1 Fish Tank Water Testing Kit For Aquarium Pond - Accurate Testing Nitrate Nitrite Hardness Free
Amazon.com
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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
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API 5-IN-1 TEST STRIPS Freshwater And Saltwater Aquarium Test Strips 100-Count Box
Amazon.com
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API 5-IN-1 TEST STRIPS Freshwater And Saltwater Aquarium Test Strips 100-Count Box
Amazon.com
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$29.59
11 in 1 - Aquarium Test Strips | 950 Tests - 150 Strips | Fish Tank Aquariums Water Test Kit & Ebook | Aquarium Thermometer | Fish Tank Water Testing
Amazon.com
4K+
25% off
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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
Amazon.com
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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
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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
Amazon.com
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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
Amazon.com
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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
Amazon.com
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APEC TDS Meter Digital Water Quality TDS Test Kit Meter With Carrying Case, 0 To 1999 Ppm Measurement Range, 1 Ppm Resolution, +/- 2% Readout Accuracy
Amazon.com
$18.99
APEC TDS Meter Digital Water Quality TDS Test Kit Meter With Carrying Case, 0 To 1999 Ppm Measurement Range, 1 Ppm Resolution, +/- 2% Readout Accuracy
Amazon.com
$28.00
API SALTWATER MASTER TEST KIT 550-Test Saltwater Aquarium Water Test Kit
Amazon.com
$28.00
API SALTWATER MASTER TEST KIT 550-Test Saltwater Aquarium Water Test Kit
Amazon.com
$31.93
$45.00
Hach Free & Total Chlorine Test Strips, 0-10 Mg/L, Chlorine Testing, Water Quality Test Strips, Accurate Chlorine Measurement, Easy-To-Use Chlorine
Amazon.com
Free shipping
29% off
$31.93
$45.00
Hach Free & Total Chlorine Test Strips, 0-10 Mg/L, Chlorine Testing, Water Quality Test Strips, Accurate Chlorine Measurement, Easy-To-Use Chlorine
Amazon.com
$13.98
Aawipes Ammonia Test Strips For Fish Tank Aquarium Test Strips Aquarium Water Test Kit Freshwater Fish Tank (100)
Amazon.com
17
$13.98
Aawipes Ammonia Test Strips For Fish Tank Aquarium Test Strips Aquarium Water Test Kit Freshwater Fish Tank (100)
Amazon.com
$12.98
API 5-In-1 Test Strips Freshwater And Saltwater Aquarium Test Strips 25-Count Box
Amazon.com
10K+
$12.98
API 5-In-1 Test Strips Freshwater And Saltwater Aquarium Test Strips 25-Count Box
Amazon.com
$14.25
API POND 5 in 1 POND TEST STRIPS Pond Water Test Strips 25-Count
Amazon.com
1K+
$14.25
API POND 5 in 1 POND TEST STRIPS Pond Water Test Strips 25-Count
Amazon.com
$30.14
API POND MASTER TEST KIT Pond Water Test Kit 500-Test
Amazon.com
$30.14
API POND MASTER TEST KIT Pond Water Test Kit 500-Test
Amazon.com
$15.99
Wutest 9-Way Aquarium Test Strips - 150 Aquarium Water Test Kit Fish Tank Test Kit Quick & Accurate Testing Iron Copper Nitrate Nitrite Chlorine Total
Amazon.com
161
$15.99
Wutest 9-Way Aquarium Test Strips - 150 Aquarium Water Test Kit Fish Tank Test Kit Quick & Accurate Testing Iron Copper Nitrate Nitrite Chlorine Total
Amazon.com
$185.99
Kactoily Smart Aquarium Water Monitor, Salinity Ph ORP TDS EC Temp Multi-Parameter Tester For Freshwater Saltwater Fish Tanks Real-Time Alerts
Amazon.com
30
Free shipping
$185.99
Kactoily Smart Aquarium Water Monitor, Salinity Ph ORP TDS EC Temp Multi-Parameter Tester For Freshwater Saltwater Fish Tanks Real-Time Alerts
Amazon.com
$13.97
$18.97
Just Fitter Alkaline Water Ph Test Strips. Testing Kit For Home Drinking Water And Liquids. Universal Tester For Aquarium, Fish Tank, Pool, Hot Tub,
Amazon.com
96
26% off
$13.97
$18.97
Just Fitter Alkaline Water Ph Test Strips. Testing Kit For Home Drinking Water And Liquids. Universal Tester For Aquarium, Fish Tank, Pool, Hot Tub,
Amazon.com
$15.99
10-In-1 Aquarium Test Strips (100 Strips) 50 Multi-Test + 50 Ammonia Strips | Ammonia Test Strips For Fish Tank, Aquariums, Ponds & Shrimp Tank | For
Amazon.com
$15.99
10-In-1 Aquarium Test Strips (100 Strips) 50 Multi-Test + 50 Ammonia Strips | Ammonia Test Strips For Fish Tank, Aquariums, Ponds & Shrimp Tank | For
Amazon.com
$129.50
APERA INSTRUMENTS AI316 Premium Series PC60 5-In-1 Waterproof Ph/EC (Conductivity) /TDS (Ppm) /Salinity (Ppt) /Temp. Multi-Parameter Pocket Tester Kit
Amazon.com
822
Free shipping
$129.50
APERA INSTRUMENTS AI316 Premium Series PC60 5-In-1 Waterproof Ph/EC (Conductivity) /TDS (Ppm) /Salinity (Ppt) /Temp. Multi-Parameter Pocket Tester Kit
Amazon.com
$13.98
Pondcare Test Kits AQP80- Nitrate Test Kit By API Pond
ThePondOutlet
30-day returns (most items)
$13.98
Pondcare Test Kits AQP80- Nitrate Test Kit By API Pond
ThePondOutlet
$9.48
Pondcare Test Kits AQP160-Wide Range PH Test Kit By API Pond
ThePondOutlet
1K+
$9.48
Pondcare Test Kits AQP160-Wide Range PH Test Kit By API Pond
ThePondOutlet
$13.98
Copper Test Kit By Aquarium Pharmaceuticals
ThePondOutlet
$13.98
Copper Test Kit By Aquarium Pharmaceuticals
ThePondOutlet
$128.99
PAR Meter For Reef Tank Waterproof PAR Meter Aquarium IP68 Quantum Sensor PPFD Meter Data Logger, Full-Spectrum Quantum PAR Meter With 79" Cable And
Amazon.com
Free shipping
$128.99
PAR Meter For Reef Tank Waterproof PAR Meter Aquarium IP68 Quantum Sensor PPFD Meter Data Logger, Full-Spectrum Quantum PAR Meter With 79" Cable And
Amazon.com
$9.99
Umlecoa 7 in 1 Aquarium Test Kit For Freshwater And Saltwater - 125 Aquarium Test Strips With Test Tube & Thermometer - Fast & Accurate Water Testing
Amazon.com
$9.99
Umlecoa 7 in 1 Aquarium Test Kit For Freshwater And Saltwater - 125 Aquarium Test Strips With Test Tube & Thermometer - Fast & Accurate Water Testing
Amazon.com
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Pondcare Test Kits AQP59- KH Test Kit By API Pond
ThePondOutlet
$8.98
Pondcare Test Kits AQP59- KH Test Kit By API Pond
ThePondOutlet
$9.99
Digital TDS Meter, Hofun 3 in 1 TDS, EC & Temperature Meter, Accurate & Reliable PPM Meter, Water Testing Kits For Drinking Water Quality, Tap, Well,
Amazon.com
2K+
$9.99
Digital TDS Meter, Hofun 3 in 1 TDS, EC & Temperature Meter, Accurate & Reliable PPM Meter, Water Testing Kits For Drinking Water Quality, Tap, Well,
Amazon.com
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CIZTADA Ph Meter For Water 4 in 1 Ph EC TDS Temp Meter For Hydroponics PPM And EC Water Tester Digital Ph PPM Meter For Nutrients Growing Hydroponics
Amazon.com
$21.84
CIZTADA Ph Meter For Water 4 in 1 Ph EC TDS Temp Meter For Hydroponics PPM And EC Water Tester Digital Ph PPM Meter For Nutrients Growing Hydroponics
Amazon.com
$16.62
$21.14
Seachem Multitest Iron Test Kit
Amazon.com
243
21% off
$16.62
$21.14
Seachem Multitest Iron Test Kit
Amazon.com
$31.99
Total Water Hardness Test For Pool, Aquarium, And Drinking Water, And Improving Water Softener Efficiency, Hard Water Test Kit
Amazon.com
40
$31.99
Total Water Hardness Test For Pool, Aquarium, And Drinking Water, And Improving Water Softener Efficiency, Hard Water Test Kit
Amazon.com
$147.00
Hach Chlorine (Free And Total) Test Kit, Model CN-70, Visual Comparator, Portable, Field Use, Lab Use, EPA Approved, Colorimetric Method, Powder
Amazon.com
Free shipping
$147.00
Hach Chlorine (Free And Total) Test Kit, Model CN-70, Visual Comparator, Portable, Field Use, Lab Use, EPA Approved, Colorimetric Method, Powder
Amazon.com
$24.99
GISNPA 5-In-1 Salt Water Pool Tester, Ph/TDS/EC/Salinity/Temp Meter, 0.01 Resolution High Accuracy Water Tester For Drinking Water, Hydroponics,
Amazon.com
$24.99
GISNPA 5-In-1 Salt Water Pool Tester, Ph/TDS/EC/Salinity/Temp Meter, 0.01 Resolution High Accuracy Water Tester For Drinking Water, Hydroponics,
Amazon.com
$12.99
Simpure TDS Meter Digital Water Tester, 4 in 1 TDS EC & Temperature Meter, Water Quality Hardness Testing Kits, High Accuracy PPM Meter For Drinking
Amazon.com
$12.99
Simpure TDS Meter Digital Water Tester, 4 in 1 TDS EC & Temperature Meter, Water Quality Hardness Testing Kits, High Accuracy PPM Meter For Drinking
Amazon.com
$14.57
Hydrion Test Strips: 0 To 1,000 Ppm Free Chlorine, Free Chlorine, 100 Tests Model: CH-1000
Grainger
$14.57
Hydrion Test Strips: 0 To 1,000 Ppm Free Chlorine, Free Chlorine, 100 Tests Model: CH-1000
Grainger
$32.96
$50.48
API Freshwater Aquarium Master Test Kit, 800 Count
Chewy.com
34% off
$32.96
$50.48
API Freshwater Aquarium Master Test Kit, 800 Count
Chewy.com
$39.19
Pentair Everpure H2O Test Express Water Test Kit
IceMachinesPlus_2024
$39.19
Pentair Everpure H2O Test Express Water Test Kit
IceMachinesPlus_2024
$31.11
10 in 1 Water Quality Tester PH TDS EC SALT TEMP S.G ORP H2 Fertile Resistivity Meter Portable Test
Aliexpress
Free shipping
$31.11
10 in 1 Water Quality Tester PH TDS EC SALT TEMP S.G ORP H2 Fertile Resistivity Meter Portable Test
Aliexpress
$19.99
2 PACK 6-In-1 Aquarium Water Test Strips 100 Count Freshwater/Saltwater Test Kit
Etsy
13K+
Free shipping
$19.99
2 PACK 6-In-1 Aquarium Water Test Strips 100 Count Freshwater/Saltwater Test Kit
Etsy
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    Shop fish tank water test kit

    Sponsored
    About our ads
    $32.96
    $35.60
    API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-Colored
    Amazon.com
    $32.96
    $35.60
    API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-Colored
    Amazon.com
    $12.98
    Aquarium Test Strips For Freshwater Fish: 7 in 1 Fish Tank Water Testing Kit For Aquarium Pond - Accurate Testing Nitrate Nitrite Hardness Free
    Amazon.com
    $12.98
    Aquarium Test Strips For Freshwater Fish: 7 in 1 Fish Tank Water Testing Kit For Aquarium Pond - Accurate Testing Nitrate Nitrite Hardness Free
    Amazon.com
    $24.98
    API 5-IN-1 TEST STRIPS Freshwater And Saltwater Aquarium Test Strips 100-Count Box
    Amazon.com
    $24.98
    API 5-IN-1 TEST STRIPS Freshwater And Saltwater Aquarium Test Strips 100-Count Box
    Amazon.com
    $21.99
    $29.59
    11 in 1 - Aquarium Test Strips | 950 Tests - 150 Strips | Fish Tank Aquariums Water Test Kit & Ebook | Aquarium Thermometer | Fish Tank Water Testing
    Amazon.com
    4K+
    25% off
    $21.99
    $29.59
    11 in 1 - Aquarium Test Strips | 950 Tests - 150 Strips | Fish Tank Aquariums Water Test Kit & Ebook | Aquarium Thermometer | Fish Tank Water Testing
    Amazon.com
    $15.99
    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
    Amazon.com
    $15.99
    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
    Amazon.com
    $14.99
    $18.99
    7 in 1 - Aquarium Test Strips | 100 Fast & Accurate Strips | Fish Tank Aquariums Water Test Kit & Ebook | Aquarium Thermometer | Fish Tank Water
    Amazon.com
    21% off
    $14.99
    $18.99
    7 in 1 - Aquarium Test Strips | 100 Fast & Accurate Strips | Fish Tank Aquariums Water Test Kit & Ebook | Aquarium Thermometer | Fish Tank Water
    Amazon.com
    $18.99
    APEC TDS Meter Digital Water Quality TDS Test Kit Meter With Carrying Case, 0 To 1999 Ppm Measurement Range, 1 Ppm Resolution, +/- 2% Readout Accuracy
    Amazon.com
    $18.99
    APEC TDS Meter Digital Water Quality TDS Test Kit Meter With Carrying Case, 0 To 1999 Ppm Measurement Range, 1 Ppm Resolution, +/- 2% Readout Accuracy
    Amazon.com
    $28.00
    API SALTWATER MASTER TEST KIT 550-Test Saltwater Aquarium Water Test Kit
    Amazon.com
    $28.00
    API SALTWATER MASTER TEST KIT 550-Test Saltwater Aquarium Water Test Kit
    Amazon.com
    $31.93
    $45.00
    Hach Free & Total Chlorine Test Strips, 0-10 Mg/L, Chlorine Testing, Water Quality Test Strips, Accurate Chlorine Measurement, Easy-To-Use Chlorine
    Amazon.com
    Free shipping
    29% off
    $31.93
    $45.00
    Hach Free & Total Chlorine Test Strips, 0-10 Mg/L, Chlorine Testing, Water Quality Test Strips, Accurate Chlorine Measurement, Easy-To-Use Chlorine
    Amazon.com
    $13.98
    Aawipes Ammonia Test Strips For Fish Tank Aquarium Test Strips Aquarium Water Test Kit Freshwater Fish Tank (100)
    Amazon.com
    17
    $13.98
    Aawipes Ammonia Test Strips For Fish Tank Aquarium Test Strips Aquarium Water Test Kit Freshwater Fish Tank (100)
    Amazon.com
    $12.98
    API 5-In-1 Test Strips Freshwater And Saltwater Aquarium Test Strips 25-Count Box
    Amazon.com
    10K+
    $12.98
    API 5-In-1 Test Strips Freshwater And Saltwater Aquarium Test Strips 25-Count Box
    Amazon.com
    $14.25
    API POND 5 in 1 POND TEST STRIPS Pond Water Test Strips 25-Count
    Amazon.com
    1K+
    $14.25
    API POND 5 in 1 POND TEST STRIPS Pond Water Test Strips 25-Count
    Amazon.com
    $30.14
    API POND MASTER TEST KIT Pond Water Test Kit 500-Test
    Amazon.com
    $30.14
    API POND MASTER TEST KIT Pond Water Test Kit 500-Test
    Amazon.com
    $15.99
    Wutest 9-Way Aquarium Test Strips - 150 Aquarium Water Test Kit Fish Tank Test Kit Quick & Accurate Testing Iron Copper Nitrate Nitrite Chlorine Total
    Amazon.com
    161
    $15.99
    Wutest 9-Way Aquarium Test Strips - 150 Aquarium Water Test Kit Fish Tank Test Kit Quick & Accurate Testing Iron Copper Nitrate Nitrite Chlorine Total
    Amazon.com
    $185.99
    Kactoily Smart Aquarium Water Monitor, Salinity Ph ORP TDS EC Temp Multi-Parameter Tester For Freshwater Saltwater Fish Tanks Real-Time Alerts
    Amazon.com
    30
    Free shipping
    $185.99
    Kactoily Smart Aquarium Water Monitor, Salinity Ph ORP TDS EC Temp Multi-Parameter Tester For Freshwater Saltwater Fish Tanks Real-Time Alerts
    Amazon.com
    $13.97
    $18.97
    Just Fitter Alkaline Water Ph Test Strips. Testing Kit For Home Drinking Water And Liquids. Universal Tester For Aquarium, Fish Tank, Pool, Hot Tub,
    Amazon.com
    96
    26% off
    $13.97
    $18.97
    Just Fitter Alkaline Water Ph Test Strips. Testing Kit For Home Drinking Water And Liquids. Universal Tester For Aquarium, Fish Tank, Pool, Hot Tub,
    Amazon.com
    $15.99
    10-In-1 Aquarium Test Strips (100 Strips) 50 Multi-Test + 50 Ammonia Strips | Ammonia Test Strips For Fish Tank, Aquariums, Ponds & Shrimp Tank | For
    Amazon.com
    $15.99
    10-In-1 Aquarium Test Strips (100 Strips) 50 Multi-Test + 50 Ammonia Strips | Ammonia Test Strips For Fish Tank, Aquariums, Ponds & Shrimp Tank | For
    Amazon.com
    $129.50
    APERA INSTRUMENTS AI316 Premium Series PC60 5-In-1 Waterproof Ph/EC (Conductivity) /TDS (Ppm) /Salinity (Ppt) /Temp. Multi-Parameter Pocket Tester Kit
    Amazon.com
    822
    Free shipping
    $129.50
    APERA INSTRUMENTS AI316 Premium Series PC60 5-In-1 Waterproof Ph/EC (Conductivity) /TDS (Ppm) /Salinity (Ppt) /Temp. Multi-Parameter Pocket Tester Kit
    Amazon.com