Calcium chloride works by increasing the calcium hardness levels in your pool to prevent the water from becoming too corrosive or too soft.
The calcium level of your pool refers to how ‘soft’ or ‘hard’ the water is. Maintaining a calcium hardness level of 200-400 ppm is required for the structural health of your swimming pool.
Calcium chloride is added to pools to increase calcium hardness, which prevents damage to pool surfaces and equipment and improves water quality.
Pool surfaces can get damaged if the water in the pool is too low in calcium hardness.
This can cause the water to become corrosive, leading to etching and staining of the pool surface, tiles, and grout.
Low calcium levels can also cause the pebble pools to deteriorate or cause calcium to be drawn out of the concrete walls which leads to bad staining and a rough and uncomfortable surface for swimmers.
Always wear chemically-resistant gloves and protective goggles when handling calcium chloride. This chemical can get very hot when added to water and cause burns if improperly handled.