Check the listing for details. BioGuard Smart Shock 1 lb Bags - 6 Pack. Condition: New. Listed at 53.94 USD. Smart Shock is the preferred shock product for the BioGuard Care System. Weekly use of Smart Shock keeps the water crystal blue and sparkling. It oxidizes organic contaminants that cause cloudy water, musty odors and eye irritation. It also kills bacteria and algae, and clarifies the water using a filter enhancer. Smart Shock buffers the pH to provide brilliantly clear water with no cloudy residue and without increasing the pH. Product Benefits: Kills bacteria, algae Clarifies water Maintains brilliantly clear water Treat and swim in 15 minutes For use with all pool surfaces Dosage: Maintenance: 1 lb per 12,000 gallons weekly Package Includes: 1 x 1 lb Bag Algae: 5 lbs per 12,000 gallons | Wait 15 minutes, add 40 oz. of BioGuard Back-Up Algaecide per 25,000 gallons