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The API Ammonia Test Kit measures ammonia to help you prevent fish loss.


The API Master Test Kit measures the 4 most important levels in freshwater aquariums quickly and accurately. pH, high range pH, ammonia, nitrite, and nitrate.


Use the API® NITRATE TEST KIT to ensure that the nitrate levels in your tank are safe and healthy for your fish.


The API® NITRITE TEST KIT reads nitrite levels quickly and accurately in your tank, and tests parameters from 0 to 5 ppm.


Measure levels of Nitrite, Nitrate, Carbonate & General Hardness, and pH found in aquarium water.