• BioGuard’s best to kill bacteria, oxidize, buffer and clarify your water
• Contains blue algae killing crystals
• Treat and swim in as soon as 15 minutes
• Can be used with the BioGuard 3-Step Care System

Destroying organic contaminants* from the environment and bathers is important

Shocking your pool water is a needed step for proper pool maintenance. Shocks or oxidizers chemically destroy organic contaminants, remove combined chlorine and help restore water clarity.