American GH Conditioning Salts 500g (formerly American Cichlid GH Conditioner)With added potassium and phosphate free. American GH Conditioning Salts add the essential minerals and trace elements which are insufficient in many town water supplies and rain water. These salts increase the GH (general hardness) of water, promoting healthy osmosis control for optimum body function and ensuring the good health and longer life of your fish. Directions: 1 level teaspoon or 5g to 10 litres of water will raise general hardness by