What is the ideal range for calcium hardness in pool water?

The ideal range for calcium hardness in pool water is generally considered to be between 200 to 400 parts per million (ppm). This range is important for several reasons.

Calcium hardness helps to stabilize water in pools and prevent it from being corrosive or scaling. When the calcium levels are too low, the water can become corrosive and lead to damage to pool surfaces, equipment, and plumbing. Conversely, when the levels are too high, it can lead to the formation of scale, which can also damage equipment and require costly maintenance.

Maintaining calcium hardness within the 200 to 400 ppm range ensures that the pool water is balanced, contributes to a comfortable swimming experience, and prolongs the life of the pool and its components. This range is widely accepted in the industry for maintaining optimal water quality in swimming pools.