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. Contains: 12 X 1lb. treatments Dosage: 1 lb. treats 10,000 gallons.