Quick Joe Ice melt
High Alkalinity will keep your pool water on the higher end of the pH scale, or more basic rather than acidic. High Alkalinity is not terrible but there are two things that can happen. If the water is constantly basic a "scale" can develop. The other thing that can happen is you will notice your pool will get cloudy when you add pH increaser, alkalinity increaser or calcium hardness increaser when either one of those three are on the high side already.
calcium
Presence of bicarbonates of chlorides or sulphates of calcium or magnesium in water are the main causes of hardness of water.
The best way to lower calcium hardness in the pool water is to drain the water and refill with water of lower calcium hardness. Have the calcium hardness tested for both the pool water and fill water. Ideal range is 175-300ppm. There are 'calcium reducer' products available through pool stores, but not sure how effective or economical they are.
If the calcium is a result of pool chemicals, draining some or all of the pool water will lower the calcium hardness level. If the cause is the fill water, commercial hardness reducers or chelating agents will bond with the calcium to keep it trapped in solution.
The hardness of bone is due to the calcium salts deposited in it.The exceptional hardness of bone, which allows it to resist compression, is attributed to the presence of inorganic hydroxyapatites. Hydroxyapatites such as calcium phosphates are particularly important for bone hardness. Organic substances such as collagen fibers contribute to tensile strength, but not to hardness.the presence of inorganic hydroxyapatites.
calcium and magnesium
Buildup of minerals like calcium.
The function of calcium salts is to provide hardness and strength and resist compression.
calcium-phosphate salt crystals
The calcium reacts with the water, producing calcium hydroxide and hydrogen gas. Ca+ 2H2O --> Ca(OH)2 + H2
The recommended frequency for checking calcium hardness in swimming pools is once a month. Other water tests will depend on how often the pool is used.