Why is Calcium Hardness important?
Water Hardness in general refers to the total mineral content of the water (calcium, magnesium, iron, manganese and other elements). These elements are present in the water used to fill the pool, and the levels can increase through the use of regular pool chemicals (eg. calcium from Shock Chlorine). However, with pools and spas we are really interested in the calcium hardness levels only. The ideal range for calcium hardness is 150 – 200 ppm. If the calcium hardness is too low, the water can become corrosive and may damage the pool surfaces. Metal components may also be damaged. Low calcium hardness can easily be increased using Hardness Increaser (calcium chloride). The dose can again be calculated using the Chemical Calculator. If the calcium hardness is too high, you may see scale formation on pool and fitment surfaces, and the pool water may become cloudy. The only reliable way of reducing calcium hardness is to replace some or all of the water in the pool.
