Regal 12001583 pH Minus 3 Lb. This dry acid decreases the pH of pool water slowly and effectively. The granular product is more convenient than a liquid acid. Product of choice for lowering pH.
WARNING: The following product(s) can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov