Restore and Maintain GH of salts designed to replenish physiologically relevant minerals that are removed by reverse osmosis or deionizing filtration. Replenish restores General Hardness (GH) using a balanced blend of both "soft" (sodium, potassium) and "hard" (calcium, magnesium) salts. Restoration of mineral content is essential since a complete lack of minerals will result in osmotic stress in those species whose osmoregulation systems are adapted to a mineralized environment. Severe osmotic stress can result in osmotic shock which will lead to rapid death. Calcium (min). . . . . . 13. 00% Calcium (max). . . . . . 14. 00% Magnesium (min). . . . . . . 1. 00% Potassium (min). . . . . . 0. 12% Sodium (min). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 60% Sodium (max). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0. 70% Ingredients: calcium chloride, magnesium chloride, sodium chloride, potassium chloride