BioGuard Burnout 73 Swimming Pool Shock, 12 lbs, (12 Pack)

BioGuard Burnout 73 Swimming Pool Shock, 12 lbs, (12 Pack) Powerful calcium hypochlorite pool shock for effective sanitation BioGuard's strongest shock formulation available Treats up to 16, 500 gallons of water per 1 lb Convenient 12-pack for extended use Ensures clean, clear water and helps prevent algae growth