Rx Clear Super Shock 68% Calcium Hypochlorite Pool Shock - 1 lb, 48 Pack

Contains 68% calcium hypochlorite, yielding 65% available chlorine Raises free chlorine levels, water hardness, and pH levels Dilute Super Shock in a bucket of water before dispensing it around the pool Add 1 lb per 10,000 gallons of pool water for regular shocking Add 3 lbs per 10,000 gallons in order to kill off algae No risk of bleaching vinyl pool liners Use Super Shock at night and wait until 8-10 hours have passed since starting the treatment before swimming