GLB SuperSonic Pool Shock

GLB SuperSonic is a highly effective multi-purpose chlorine shock that sanitizes and clarifies while controlling algae. It is convenient, easy to use and won't over stabilize your pool water. The fast-acting formula can be used on all pool surfaces, does not contain cyanuric acid and leaves no residue. SuperSonic sanitizes, clarifies, fights algae and won’t overstabilize pool water. It’s safe for use on all pool surfaces and leaves no residue. Features:  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.