In The Swim Alkalinity Increaser for Swimming Pools – Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water – 100% Sodium Bicarbonate – 25 Pounds

About this item In Swim Alkalinity Increaser maintains pH and chlorine levels. Prevents pH swings, maintaining stable water chemistry. High pH causes skin rashes; low pH stings eyes. Ensures refreshing pool water, even in hot summers. Maintain alkalinity at 90-120 ppm. Add 1.5 lbs per 10,000 gallons to increase by 10 ppm.