Shop aquarium water testing kit

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$25.75
$35.59
API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-Colored
Amazon.com
28K+
27% off
$25.75
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API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-Colored
Amazon.com
28K+
$19.79
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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
4K+
10% off
$19.79
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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
4K+
$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
2K+
$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
2K+
$49.99
Tilswall Digital Ph Meter With ATC For Water, Pool, Aquarium, Hydroponics
Tilswall US
$49.99
Tilswall Digital Ph Meter With ATC For Water, Pool, Aquarium, Hydroponics
Tilswall US
$72.99
$85.99
Tilswall Wireless 7-In-1 Water Monitor For Home & Aquarium
Tilswall US
15% off
$72.99
$85.99
Tilswall Wireless 7-In-1 Water Monitor For Home & Aquarium
Tilswall US
$49.99
$54.99
Tilswall Digital Water Tester 5-In-1 PH Meter & TDS Meter
Tilswall US
$49.99
$54.99
Tilswall Digital Water Tester 5-In-1 PH Meter & TDS Meter
Tilswall US
$67.99
Agtec Salinity Refractometer, Aquarium & Seawater Dual Scale (1,0 To 1,070 SG)
Agriculture Solutions LLC
$67.99
Agtec Salinity Refractometer, Aquarium & Seawater Dual Scale (1,0 To 1,070 SG)
Agriculture Solutions LLC
$35.98
$54.99
API Freshwater Master Test Kit
Petco.com
353
34% off
$35.98
$54.99
API Freshwater Master Test Kit
Petco.com
353
$39.97
$79.94
Pocket Hydroponics PH EC Meter, Digital LCD Tester, Aquarium Water Test Pen For PH, TDS & Temperature | The Cart Load
Inspire Uplift
Free shipping
50% off
$39.97
$79.94
Pocket Hydroponics PH EC Meter, Digital LCD Tester, Aquarium Water Test Pen For PH, TDS & Temperature | The Cart Load
Inspire Uplift
Free shipping
$454.27
$648.50
Oakton WD-35660-10 PH250 Waterproof Ph, ORP, Temp Handheld Meter Kit
Test Equipment Depot
29% off
$454.27
$648.50
Oakton WD-35660-10 PH250 Waterproof Ph, ORP, Temp Handheld Meter Kit
Test Equipment Depot
$153.55
PCE Instruments PCE-PH20, Waterproof Aquarium Ph Meter With External Ph Electrode
Selectum
$153.55
PCE Instruments PCE-PH20, Waterproof Aquarium Ph Meter With External Ph Electrode
Selectum
$301.34
Extech Ph/Mv/Temperature Meter Kit: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-15
Grainger
1
$301.34
Extech Ph/Mv/Temperature Meter Kit: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-15
Grainger
1
$39.97
$79.94
LCD Tester Pocket Hydroponics, Digital Electric PH Meter, Aquarium Water Test Pen | The Cart Load
Inspire Uplift
Free shipping
50% off
$39.97
$79.94
LCD Tester Pocket Hydroponics, Digital Electric PH Meter, Aquarium Water Test Pen | The Cart Load
Inspire Uplift
Free shipping
$14.99
HM Digital TDS-EZ Water Quality TDS Tester
Aquasure Corporation
$14.99
HM Digital TDS-EZ Water Quality TDS Tester
Aquasure Corporation
$442.48
Extech Pocket Multiparameter Meter Kit: Chlorine/Ph/Temp, 0 Ph To 14 Ph, -999 Mv To 999 Mv Model: EX800
Grainger
$442.48
Extech Pocket Multiparameter Meter Kit: Chlorine/Ph/Temp, 0 Ph To 14 Ph, -999 Mv To 999 Mv Model: EX800
Grainger
$315.88
Extech Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: EC500
Grainger
491
$315.88
Extech Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: EC500
Grainger
491
$40.00
API Freshwater Master Test Kit - 1 Each
Instacart
$40.00
API Freshwater Master Test Kit - 1 Each
Instacart
$44.97
Digital Water Quality Tester Pen PH TDS EC ORP Temp SG Salinity Meter Digital Water Quality Tester Pen PH TDS EC ORP Temp SG Salinity Meter
Inspire Uplift
$44.97
Digital Water Quality Tester Pen PH TDS EC ORP Temp SG Salinity Meter Digital Water Quality Tester Pen PH TDS EC ORP Temp SG Salinity Meter
Inspire Uplift
$13.39
Aquachek Red (50) For Total Bromine, Total Alkalinity, Total Hardness & Ph, 1 Pack For Pools
Doheny's
$13.39
Aquachek Red (50) For Total Bromine, Total Alkalinity, Total Hardness & Ph, 1 Pack For Pools
Doheny's
$9.99
High-Quality TDS Meter Water Test Pen - Ideal For Drinking Water And Aquarium Testing
Digitalzakka
$9.99
High-Quality TDS Meter Water Test Pen - Ideal For Drinking Water And Aquarium Testing
Digitalzakka
$28.78
Digital PH TEMP Tester Meter Pen For Aquarium Pool Wine Water Laboratory Food
motorgenic.com
Free shipping
$28.78
Digital PH TEMP Tester Meter Pen For Aquarium Pool Wine Water Laboratory Food
motorgenic.com
Free shipping
$32.78
5In1 PH/TDS/EC/Salinity/Temperature Digital Water Quality Tester Meter Test Tool
vipih.com
$32.78
5In1 PH/TDS/EC/Salinity/Temperature Digital Water Quality Tester Meter Test Tool
vipih.com
$87.99
Red Sea Marine Care Multi Test Kit
Petco.com
554
$87.99
Red Sea Marine Care Multi Test Kit
Petco.com
554
$87.99
Red Sea Foundation Pro Multi Test Kit
Petco.com
61
$87.99
Red Sea Foundation Pro Multi Test Kit
Petco.com
61
$27.95
$41.95
Water Quality Tester 5 in 1 Digital TDS Meter For Drinking Water Aquarium Pool Hydroponics
www.fruugo.us
33% off
$27.95
$41.95
Water Quality Tester 5 in 1 Digital TDS Meter For Drinking Water Aquarium Pool Hydroponics
www.fruugo.us
$14.00
API 5 in 1 Aquarium Test Strips - 25 Ct
Instacart
$14.00
API 5 in 1 Aquarium Test Strips - 25 Ct
Instacart
$18.00
API PH Test & Adjuster Kit For Freshwater - 1 Each
Instacart
$18.00
API PH Test & Adjuster Kit For Freshwater - 1 Each
Instacart
$17.99
4-In-1 Digital Water Tester For Accurate Drinking Water And Aquarium Measurements 01
Evalm
$17.99
4-In-1 Digital Water Tester For Accurate Drinking Water And Aquarium Measurements 01
Evalm
$22.34
HM Digital TDS-4TM, Aquarium TDS Meter With Digital Thermometer
Selectum
164
$22.34
HM Digital TDS-4TM, Aquarium TDS Meter With Digital Thermometer
Selectum
164
$32.99
Multifunction Water Quality Meter For Aquariums - 10 in 1 PH EC TDS ORP Temperature Tester
Evalm
$32.99
Multifunction Water Quality Meter For Aquariums - 10 in 1 PH EC TDS ORP Temperature Tester
Evalm
$17.99
4-In-1 Digital Water Tester For Accurate Drinking Water And Aquarium Measurements 02
Evalm
$17.99
4-In-1 Digital Water Tester For Accurate Drinking Water And Aquarium Measurements 02
Evalm
$25.23
$49.51
Bluetooth 6 in 1 TDS Meter Digital Water Tester EC TDS SALT SG Temperature PH Meter Aquarium Water
Aliexpress
Free shipping
49% off
$25.23
$49.51
Bluetooth 6 in 1 TDS Meter Digital Water Tester EC TDS SALT SG Temperature PH Meter Aquarium Water
Aliexpress
Free shipping
$198.01
8-In-1 Water Quality Tester Salinity & Seawater Aquarium Water Quality Tester. Other Test, Measurement & Inspection.
eBay
Free shipping
$198.01
8-In-1 Water Quality Tester Salinity & Seawater Aquarium Water Quality Tester. Other Test, Measurement & Inspection.
eBay
Free shipping
$36.85
$80.11
Professional Ph Meter Pen Type Water Quality Tester Acidometer For Aquarium Acidimeter Water
Aliexpress
Free shipping
54% off
$36.85
$80.11
Professional Ph Meter Pen Type Water Quality Tester Acidometer For Aquarium Acidimeter Water
Aliexpress
Free shipping
$44.11
$86.32
Online Ph / EC Monitor Meter Acidometer 2 in 1 PH EC Meter For Aquarium Multi-Parameter Water
Aliexpress
Free shipping
48% off
$44.11
$86.32
Online Ph / EC Monitor Meter Acidometer 2 in 1 PH EC Meter For Aquarium Multi-Parameter Water
Aliexpress
Free shipping
$34.98
API Pond Master Test Kit
The Pond Guy
2K+
$34.98
API Pond Master Test Kit
The Pond Guy
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Shop aquarium water testing kit

Sponsored
About our ads
$25.75
$35.59
API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-Colored
Amazon.com
28K+
27% off
$25.75
$35.59
API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-Colored
Amazon.com
28K+
$19.79
$21.99
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+
10% off
$19.79
$21.99
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+
$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
2K+
$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
2K+
$49.99
Tilswall Digital Ph Meter With ATC For Water, Pool, Aquarium, Hydroponics
Tilswall US
$49.99
Tilswall Digital Ph Meter With ATC For Water, Pool, Aquarium, Hydroponics
Tilswall US
$72.99
$85.99
Tilswall Wireless 7-In-1 Water Monitor For Home & Aquarium
Tilswall US
15% off
$72.99
$85.99
Tilswall Wireless 7-In-1 Water Monitor For Home & Aquarium
Tilswall US
$49.99
$54.99
Tilswall Digital Water Tester 5-In-1 PH Meter & TDS Meter
Tilswall US
$49.99
$54.99
Tilswall Digital Water Tester 5-In-1 PH Meter & TDS Meter
Tilswall US
$67.99
Agtec Salinity Refractometer, Aquarium & Seawater Dual Scale (1,0 To 1,070 SG)
Agriculture Solutions LLC
$67.99
Agtec Salinity Refractometer, Aquarium & Seawater Dual Scale (1,0 To 1,070 SG)
Agriculture Solutions LLC
$35.98
$54.99
API Freshwater Master Test Kit
Petco.com
353
34% off
$35.98
$54.99
API Freshwater Master Test Kit
Petco.com
353
$39.97
$79.94
Pocket Hydroponics PH EC Meter, Digital LCD Tester, Aquarium Water Test Pen For PH, TDS & Temperature | The Cart Load
Inspire Uplift
Free shipping
50% off
$39.97
$79.94
Pocket Hydroponics PH EC Meter, Digital LCD Tester, Aquarium Water Test Pen For PH, TDS & Temperature | The Cart Load
Inspire Uplift
Free shipping
$454.27
$648.50
Oakton WD-35660-10 PH250 Waterproof Ph, ORP, Temp Handheld Meter Kit
Test Equipment Depot
29% off
$454.27
$648.50
Oakton WD-35660-10 PH250 Waterproof Ph, ORP, Temp Handheld Meter Kit
Test Equipment Depot
$153.55
PCE Instruments PCE-PH20, Waterproof Aquarium Ph Meter With External Ph Electrode
Selectum
$153.55
PCE Instruments PCE-PH20, Waterproof Aquarium Ph Meter With External Ph Electrode
Selectum
$301.34
Extech Ph/Mv/Temperature Meter Kit: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-15
Grainger
1
$301.34
Extech Ph/Mv/Temperature Meter Kit: 0 Ph To 14 Ph, +/-0.02 Ph, 0.01 Ph Ph Resolution, Mv/Ph/Temp Model: OYSTER-15
Grainger
1
$39.97
$79.94
LCD Tester Pocket Hydroponics, Digital Electric PH Meter, Aquarium Water Test Pen | The Cart Load
Inspire Uplift
Free shipping
50% off
$39.97
$79.94
LCD Tester Pocket Hydroponics, Digital Electric PH Meter, Aquarium Water Test Pen | The Cart Load
Inspire Uplift
Free shipping
$14.99
HM Digital TDS-EZ Water Quality TDS Tester
Aquasure Corporation
$14.99
HM Digital TDS-EZ Water Quality TDS Tester
Aquasure Corporation
$442.48
Extech Pocket Multiparameter Meter Kit: Chlorine/Ph/Temp, 0 Ph To 14 Ph, -999 Mv To 999 Mv Model: EX800
Grainger
$442.48
Extech Pocket Multiparameter Meter Kit: Chlorine/Ph/Temp, 0 Ph To 14 Ph, -999 Mv To 999 Mv Model: EX800
Grainger
$315.88
Extech Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: EC500
Grainger
491
$315.88
Extech Pocket Multiparameter Meter: Conductivity/Ph/Salinity/Temp/Total Dissolved Solids Model: EC500
Grainger
491
$40.00
API Freshwater Master Test Kit - 1 Each
Instacart
$40.00
API Freshwater Master Test Kit - 1 Each
Instacart
$44.97
Digital Water Quality Tester Pen PH TDS EC ORP Temp SG Salinity Meter Digital Water Quality Tester Pen PH TDS EC ORP Temp SG Salinity Meter
Inspire Uplift
$44.97
Digital Water Quality Tester Pen PH TDS EC ORP Temp SG Salinity Meter Digital Water Quality Tester Pen PH TDS EC ORP Temp SG Salinity Meter
Inspire Uplift

  • Aquarium Water Testing Kit - Chewy

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  • Fish Tank Test Kits

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    SponsoredView the Top 5 Fish Tank Test Kits of 2025. Free 2-Day Shipping and Free Returns.