NST Purify Shock 1LB

This swimming pool shock keeps pool water sparkling clear by eliminating organic contaminants without affecting pool water balance.

• Get back to crystal clear pool water the easy way with NST^™ Purify—a convenient and powerful swimming pool shock treatment
• Step 2 in the convenient 3-step NST^™ System
• Eliminates organic contaminants and boosts free chlorine levels in pool water without affecting balance
• This swimming pool shock is compatible with chlorine, salt chlorine generators, ozone and mineral systems
• For best results, test and balance your pool water then follow the easy step-by-step, on-pack instructions to shock treat weekly