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 kit comes with 4 glass test tubes with snap-tight caps and a convenient holding tub for easy storage. It 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!