New! Clorox Pool Shock Extra Blue 3. Four (4) Bottles of 1 Pound Each. Easy Pour Bottle. This Product Benefits Corrosion, Kills Bacteria, Scale.and Stains. Cleans Water & Stops Algae: Kills harmful bacteria and prevents equipment corrosion, scale and stains. Kills and prevents all types of swimming pool and SPA algae (green, mustard, black) Long-lasting sunlight protection: Contains chlorine stabilizer to extend the life of your clean Creates Silky Smooth Feeling Water: XTRABLUE 3 chlorinating contain conditioners for silky smooth feeling water. Safe for all swimming pool surfaces, including vinyl, plaster, fiberglass, and tile. Solve common swimming pool problems and get personalized product and dosage recommendations. Available Two (2) Packs of four bottles each. Price for each pack.