Tropic Marin Carbocalcium Powder is highly concentrated calcium and alkalinity for dissolving in reverse osmosis water to get the proven CARBOCALCIUM solution. After dissolving, one single solution can cover all the calcium and carbonate hardness requirements of a typical reef aquarium without undesirable additional compounds or excess carbon dioxide being produced. This ensures strong growth of corals, coralline algae and other reef organisms. 100 g (3.5 oz.) of Carbocalcium Powder containing more than 30,000 mg of calcium and more than 4,000dH. This high-yield product is suitable for all tank sizes and prevents the side effects of other methods of calcium hardness: the pH remains stable. There is no excess CO2 and there is no risk of unwanted phosphates being introduced through coral breakage. In addition, there is neither a creeping increase in salinity, nor increased oxygen consumption through carbon compounds. After mixing, the resulting solution is suitable for both manual dosa