Calcium Hypochlorite Granules | 73 Percent | 25 Lb | 1 Pack | GLB

GLB Supersonic 73% Cal Hypo Granular Chlorine Shock is designed to quickly raise chlorine levels and clear up cloudy water. This 25 lb pail of calcium hypochlorite granules delivers a fast-acting pool shock that helps reset your water after heavy swimming, rain, or seasonal shifts.

With 73% available chlorine, it provides a powerful dose per treatment, speeding up sanitization and oxidation to cut through organics that turn water dull. The granular chlorine dissolves quickly when added to the skimmer or directly into the pool, making it ideal for routine pool maintenance and emergency shock treatments.

• Quick chlorine boost—restores sanitization rapidly to keep your pool safe.
• High 73% available chlorine—faster results than standard shocks.
• Granular, easy-dissolve formula—smooth application after heavy use or storms.
• Ideal for cloudy water—oxidizes contaminants and clears haze.
• Large 25 lb pail—convenient, long-lasting supply for regular maintenance.

Upgrade your pool care routine with this proven calcium hypochlorite shock and enjoy clearer water sooner. Add GLB Supersonic 73% Cal Hypo Granular Chlorine Shock to your cart today and set your pool back to pristine condition.