BioGuard Smart Shock (1 lb Bags) Size:1 lb (6 Pack) spas and hot tubs:

spas and hot tubs:

Arctic Blue Shock will oxidize and clarify through the off-season months and it is ideal for all pool surfaces

Wait 1 hour and backwash thoroughly

Bioguard Winter Arctic Blue Shock:

Apply slowly and directly into swimming pool water while walking around the deep end of the swimming pool

BioGuard Smart Shock (1 lb Bags) Size:1 lb (6 Pack) spas and hot tubs:BioGuard Smart Shock (1lb) Smart Shock is the best way to shock, oxidize, buffer and clarify your pool's water. Multi functional Smart Shock also kills bacteria and contains blue algae killing crystals. Swimmers can re enter the pool quickly after treatment.