An agent for raising calcium levels in reef aquariums. In sea water, the constant value of calcium is essential for the proper development of corals and limestone algae. The recommended level of calcium in reef aquaria is 380-460 mg/l (ppm). Dosage: Dissolve 50 g of Calcium in 1000 ml RODI water. Dosage should be determined by the water tests results and daily corals’ consumption. Before applying Calcium solution into the water, it is recommended to run a water test to check current water parameters. 100 ml of Calcium solution raises the calcium level in 100 l of water by 17.5 mg/l (ppm). The product is also suitable for casual use in order to raise calcium level once. 10 g of Calcium in 100 l of water raises the calcium level by about 35 mg/l (ppm). We do not recommend raising calcium levels by more than 20 ppm per day. In order to maintain ionic balance, KH Buffer and Reef Mineral Salt should also be applied. Calcium and Magnesium can be combined together into one solution. Contains CaCl2.