This is a form of calcium that may be added to reef tanks to maintain the calcium level. However, kalkwasser (calcium hydroxide) is preferred, as adding kalkwasser does not upset the alkalinity or ionic balance the way calcium chloride can.
a calcium compound that is used to raise the calcium hardness of the water. Typically, available in a granular form for use in pools and a liquid form for use in spas and hot tubs. Used to raise the calcium hardness level, of soft pool or spa water, into the 150-200 PPM range.
Calcium chloride is an ionic compound of calcium and chlorine. It is highly soluble in water and it is deliquescent. It is a salt that is solid at room temperature, and it behaves as a typical ionic halide.