API KH Test Kit

Product Highlights Tests aquaponic water for carbonate hardness (KH). Helps detects stress on fish caused by rapid pH shifts. About This Item API KH Carbonate Hardness Test Kit: Tests aquaponic water for carbonate hardness (KH) Helps detect stress on fish caused by rapid pH shifts helps maintain KH  Carbonate hardness stabilizes aquarium pH, and can be used to determine the proper dose of pH buffers.  Tests aquaponic water for carbonate hardness (KH). Helps detect stress on fish caused by rapid pH shifts, which result from low KH levels and helps aquarist duplicate the natural habitat of their fish. In aquaponic systems we want to maintain a KH of at least 4º and it is safe to go as high as 18º. Use AquaBuffer to increase the KH levels in your system.