GLB Supersonic 1lb.

SuperSonic sanitizes, clarifies, fights algae and won’t overstabilize pool water. It’s safe for use on all pool surfaces and leaves no residue. – Contains 73% available chlorine. – Add 1 lb. per 10,000 gallons directly to the pool. – For best results, add during the evening hours. – Compatible with chlorine and salt water chlorine sanitizing systems.