Rx Clear Calcium Hardness Increaser for Swimming Pools, 4 lbs

Get prescription strength clarity with the Rx Clear Calcium Hardness Increaser! Use when the calcium hardness reading in your pool drops below 150ppm and this product will increase calcium hardness in water to prevent any stains or deterioration. The ideal range is 200 to 400 parts per million (ppm). Six lbs. per 10,000 gallons will raise the hardness level approximately 50 ppm.

One of the most important aspects of proper swimming pool care involves the maintenance of balanced water chemistry. When swimming pool chemicals are not at their ideal levels, swimmers can be at risk of contracting illnesses and suffering from skin irritation. Additionally, the water can turn dull and cloudy, and pool or spa equipment, hoses, and surfaces can become damaged. Raising calcium hardness helps prevent corrosion of metal and plaster surfaces and reduces both weathering and bubbling of specific chemicals. Spread the product over the surface of the water while the pump is running. Do not pre-dissolve this product. Rx Clear Calcium Booster is made from 100% Calcium Chloride and helps stop corrosion of metal surfaces such as light fixtures, railings, ladders, screws, pool cover components, pool heater components, and metals in your pump or filter. It also prevents etching, pitting, and delamination of concrete, plaster, gunite, shotcrete, and fiberglass pools.

Note: Do not add this product on the same day that either pH Plus or Alkalinity Increaser has been added to the pool water