Check the listing for details. Poolife Calcium Plus Water Balancer 8 lb. Condition: New. Listed at 31.99 USD. Poolife Calcium Plus is a must-have water balancer for every pool owner. This granular form of calcium chloride is specifically designed to increase the calcium hardness level in your pool. If your pool's calcium hardness level falls below 200 ppm, it can cause serious damage to your pool's surface and equipment. Poolife Calcium Plus ensures that your pool's calcium hardness is maintained at the optimal level, protecting your investment and ensuring that your pool water remains balanced. This easy-to-use product is an essential addition to any pool maintenance routine, helping you to keep your pool in pristine condition for years to come. Dosage: While water is circulating, broadcast product over the deep end of the pool If you prefer to pre-dissolve, add liquid near return line of facilitate dispersal of chemical Be sure to use a clean bucket and utensil for mixing The recommended range for calcium hardness is 200 – 1000 ppm Adding 4 lbs. of Poolife Calcium Plus per 10,000 gallons of pool water will increase calcium hardness by 50 ppm