Rx Clear Swimming Pool pH Plus | Rapid Release Increaser | 25 Lbs Box CLEAR AND CLEAN WATER- hazy, murky, or cloudy pool or spa water due to low pH can create a hassle To keep your pool water at the proper pH range of 7.2-7.6 to see a clear, comfortable, safe pool for your family use Rx Clear Swimming Pool pH Plus. RAISES LEVELS- Rx Clear Swimming Pool pH Plus corrects problems associated with low water pH, it can be used in both pools and spas, and is compatible with salt water pools.Test your pool water weekly to keep the perfect pH level in your pool for maximum comfort. PREVENTS CORROSION - of metal surfaces such as light fixtures, railings, ladders, screws, pool cover components, pool heater components, and metals in your pump or filter. Also prevents etching, pitting, and delamination of concrete, plaster, gunite, shotcrete, and fiberglass pools. QUICK DISSOLVING - Rx Clear pH Plus is made of 100% sodium carbonate also called Soda Ash. This pH plus neutralizes acidic water, eliminates corrosion and improves the effectiveness of chlorine. Use 1-2 lbs. for every 10,000 gallons until pH reaches the proper level. REDUCES IRRITATION- This product will quickly correct acidic water conditions in your pool or spa. It will slow the rapid dissipation of chlorine caused by acidic water that will help reduce eye irritation or redness, and is soft on the skin helping to reduce itchy or irritated skin after swimming.