BioGuard Smart Shock (1 lb) (12 Pack)

Features :

• BioGuardâ€TMs 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 3-Step or Once-A-Week 3 Step BioGuard Care System
• 12 Pack