A complete multi-test kit to test for ammonia, nitrate, nitrite, pH and alkalinity in aquarium water intended for marine or reef. Testing ensures the right parameters to help monitor the maintenance and growth in the aquarium and can help test for algae in aquariums with fish. All tests come in a plastic storage box. Know the metrics of your water to help ensure a quality environment. � 100 tests for NH3/NH4� (Ammonia) accurate to 0.2 ppm 50 tests for NO3 (Nitrate) accurate to 2 ppm 50 tests for NO2 (Nitrite) accurate to 0.05 ppm 100 tests for pH accurate to 0.2 ppm 55 tests for KH (Alkalinity) accurate to 1 dKH/0.36 meq/L