GLB 71238A pH Down Sanitizer- 2-Pound

This Sanitizer works most efficiently when pH is kept in proper range. Allows lowering of pH level as needed. Aids in preventing staining, scaling and clouding of pool water. Allow 6 to 8 hours for distribution throughout the pool and then recheck the pH Compatible with chlorine, bromine, ozone, biguanide sanitizers and salt water pools. Applications when pH value rises above 7.8 while the pump is in operation, distribute 4-ounce for each 10,000 gallons of water into the deep end of the pool (but not near metal fittings or the skimmer). Product contain 2-pounds. Includes 12 pieces per pack.