Jack's Magic After Shock Size:1 lb high-purity solution for keeping a

high-purity solution for keeping a saltwater pool balanced and sparkling

this brush delivers reliable performance season after season

Life-extending protection: Helps extend the service life of o-rings

Algae control: helps prevent unsightly blooms and keeps pool surfaces and water pristine

Jack's Magic After Shock Size:1 lb high-purity solution for keeping aJack's Magic After Shock is a great way to quickly reduce your chlorine levels after shocking your pool, minimizing your pool's downtime. Its fast dissolving granular formula quickly drops your chlorine level back down to safe levels, enabling you to avoid any measuring and handling messy liquid chlorine. Best of all, this product is made by Jack's Magic, an industry innovator in pool chemicals, allowing you to buy with confidence.