Blitz® No-Chlor Shock Shock And Swim! No Waiting! Compare To Oxy-Brite®, Impact®, And Shocktrine®. This Powerful Chlorine-Free Shock Zaps Organic Pollutants, Bacteria, And Algae And Boosts Chlorine’S Killing Power. Regular Use Also Clarifies And Restores Sparkle To Pool Water. Quick Dissolving Formula Requires No Pre-Mixing And Will Not Bleach Your Vinyl Liner. The Perfect Shock For Weekly Maintenance. Compatible With Bromine. Active Ingredient: Potassium Monopersulfate. Dosage: 1 Lb. Per 10,000 Gallons.