API GH and KH Test Kit

Product Highlights Tests aquaponic water for general hardness (GH) and carbonate hardness (KH) Helps detect stress on fish caused by rapid pH shifts About This Item API GH and KH Test Kit: Tests aquaponic water for general hardness (GH) and carbonate hardness (KH) Helps detect stress on fish caused by rapid pH shifts Tests aquaponic water for general hardness (GH) and carbonate hardness (KH). Helps detect stress on fish caused by rapid pH shifts, which result from low KH levels and helps aquarists 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 GH & KH RangeAquarium Life 0º – 3º (0-50 ppm)Discus, Arowana, Elephantnose,Neons, Cardinals, Live Plants 3º – 6º(50-100 ppm)Most tropical fish includingAngelfish, Cichlids, Tetras, Tilapia, Live Plants 6º – 11º(100-200 ppm)Most tropical fish includingSwordtails, Guppies, Mollies, Goldfish 8º – 12º(140-200 ppm)Marine fish and invertebrates