Hanna HI98107 Checker - Handheld Waterproof Pocket pH Tester with 0.1 Resolution pHep - Great for Aquariums, Pools, & Ponds.

$49.95

Compare at 33 stores

Hanna HI98107 Checker - Handheld Waterproof Pocket pH Tester with 0.1 Resolution pHep - Great for Aquariums, Pools, & Ponds.

$50

Compare at 32 stores

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

$21.99

Compare at 3 stores

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

$14.99

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Hach 2744850 Total Alkalinity Test Strips, 0-240 mg/L

$26.89

Compare at 6 stores

5 in 1 Pool Salt Tester & pH Meter - Aquarium Salinity, PH, Temp, EC, and TDS Meter, Digital Tester for Aquariums Pools, Spa, Hot Tub, Hydroponic, Drinking Water, Home Brewing etc

$19.99

Compare at 14 stores

Aquarium Test Strips - 9-in-1 Aquarium Test Kit with eBook - Aquarium Water Test Kit with Quick and Accurate Fish Tank Test Strips - 100 Test Strips by JNW Direct

$11.99

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Red Sea Marine Care Test Kit - High Accuracy Water Tests for Ammonia, Nitrate, Nitrite, pH & Alkalinity - Essential for Saltwater Aquarium Health

$65.02

Compare at 39 stores

Fritz Master Test Kit

$44.99

Compare at 17 stores

10-in-1 Aquarium Test Strips (50 Strips) 25 Multi-Test + 25 Ammonia | Ammonia Test kit Aquarium for Freshwater & Saltwater | Saltwater Test Strips for Fish Tanks, Ponds | Test Nitrate, pH & More.

$9.99

Compare at 3 stores

Ammonia NH3 Test Strips, 0-6ppm for Aquarium, Fish Tank and Pond Monitoring [Vial of 25]

$17.27

Compare at 3 stores