When pool water becomes too soft (i.e. its calcium hardness drops below 150 ppm) it becomes . Problems often associated with low calcium hardness include:. Jump to If the pool water becomes too soft (calcium hardness less than 150 ppm) - A pool with water that is too soft . Low total alkalinity . Jump to Why is my calcium hardness too low? - The most common cause of low calcium hardness is the introduction of water that has fewer minerals . Calcium hardness is the measure of how hard or soft your pool water is, and . If you stray too high or too low from that goal, your water will become too soft or . Jun 20, 2017 - If your chlorine level is too low, you add more chlorine. . Hardness, on the other hand, is a measure of the calcium and magnesium in the water . Aug 12, 2016 - pH. 7.2 – 7.6 is the normal range for pH. When the level is too high, you may see calcium deposits, cloudy water, and algae. When the level drops too low, your water becomes more acidic and this can result in eye and skin irritations. Pure Pool Supplies Calcium Hardness Increaser 2 Lb. (Calcium Up Calcium If calcium hardness levels are too low the 'soft water' will corrode pool I used a plastic solo cup to dish it out, tossed it lightly in the air so the product fell gently . Always try scrubbing with a firm brush and dish soap first. Filling the pool with water with very low calcium hardness water will cause the water to try and . Fibre Tech gives you answers about swimming pool resurfacing, care and maintenance . Too low calcium also effects the pH and alkalinity. Adjust the .