GREEN TO BLUE ADV 7.2LB

HTH Pool Care Green to Blue Advanced Shock is a two-part pool shock system engineered for certainty when blooms strike. Pack I delivers Cal-hypo shock to kill bacteria and fight algae; Pack II is a powerful flocculant that drops debris for easy vacuuming. Together, they help transform your swimming pool from green to blue in as little as 24 hours without adding cyanuric acid (CYA) that can lead to chlorine lock.
Safe for vinyl liners and ideal after storms or heavy use, it's fast, simple, and proven.