API FRESHWATER MASTER TEST KIT
The API® FRESHWATER MASTER TEST KIT measures the 4 most important levels in freshwater aquariums quickly and accurately, including pH, high range pH, ammonia, nitrite, and nitrate. With scientific accuracy for professional results, the reusable FRESHWATER MASTER TEST KIT comes with 4 glass test tubes with snap-tight caps and a convenient holding tub for easy storage. Also includes a step-by-step instruction booklet with a color chart that provides information on how to correct unsafe water conditions.
We recommend that you take a few minutes each week to monitor your aquarium conditions and create a better underwater world for your fish. Testing your aquarium water has never been so easy or accurate!
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| Contains 800 tests and includes 7 test solutions, easy-to-use. |
FAQ
How often should I test my freshwater aquarium water?
We recommend testing your aquarium water at least once a week to monitor water conditions and ensure a healthy environment for your fish.
Can this test kit measure all major water parameters in freshwater tanks?
Yes, this kit measures pH, high range pH, ammonia, nitrite, and nitrate — the four most important water parameters in freshwater aquariums.
Is the test kit reusable?
Yes, the test kit uses reusable glass test tubes with snap-tight caps for convenient storage and repeated use.

Diana Hart –
I’ve used this test kit for three months now and it’s become a weekly habit. The color chart is clear and the instructions are easy to follow. I can spot ammonia spikes early and adjust water changes accordingly. The test tubes stay clean and the kit is well organized in the holding tub.
Gordon Dowd –
The accuracy is impressive. I compared results with a lab test and they matched closely. The only thing I wish was more test solutions for nitrate, but overall it’s reliable and convenient for daily monitoring.
Gavin Slater –
Great value for the number of tests included. I test every week and the kit has lasted through multiple water changes. The booklet is helpful and the color chart makes it easy to interpret results without confusion.