It’s natural residue and it’s perfectly safe to use.
Maintains a constant level of calcium and regulates pH in reef aquariums
An agent for maintaining constant calcium levels and pH adjustment in reef aquariums. In sea water, the constant value of calcium is essential for the proper development of corals and coralline 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 water test results and corals daily 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 18 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 36 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 used. Calcium and Magnesium can be combined together into one solution.
Worth knowing; Contains: calcium chloride – CaCl2 (CAS: 10043-52-4). Causes serious eye irritation. Keep out of reach of children. Wash hands thoroughly after handling. Wear eye protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/ attention. Dispose of contents/container to appropriately labeled waste containers in accordance with national regulations.
Yes, it’s possible to make stronger solutions of Calcium and Magnesium. In order to keep it safe, we recommend preparing doses maxiumum 2 or 3 times stronger. Solution of higher concentration may clog the pump. KH Buffer is a saturated solution, therefore you can’t get higher concentration.