Calcium Hardness

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Calcium hardness refers to the amount of dissolved calcium in the pool water, and it is an important factor in maintaining water balance. It is measured in parts per million (ppm), and the ideal range for most pools is between 200 and 400 ppm. Calcium hardness levels that are too high or too low can cause a variety of problems in the pool.

Effects of Low Calcium Hardness:

· Etches pool surface/plaster

· Pits concrete

· Dissolves grout

· Pits pool decking

· Water feels overly “soft” which might result in an uncomfortable sensation for swimmers

Effects of High Calcium Hardness:

· Scaling water

· White film/crusty deposits are formed

· Plugged filters

· Reduced circulation

· Cloudy water

· Heater inefficiency