In The Swim Calcium Hardness Increaser for Swimming Pools – Fast-Acting, Scale Prevention – 94% Calcium Chloride – 25 Pounds
$ 18.89
About this item Quickly raises the calcium levels in your pool to prevent low calcium levels that can cause erosion, pitting, and etching of pool surfaces. Excessive use of calcium hardness increaser can lead to scaling and blockage, potentially damaging pool equipment. Maintain proper calcium hardness for improved pool water quality. The recommended range for calcium in your water is around 180-220 ppm. Keep the ppm below 400. Add around 6 pounds per 10,000 gallons to increase hardness by approximately 50 ppm. Apply if hardness drops below 150 ppm.
