Nava Chemicals 652129061 Non-Chlorine Shock Oxidizer, Pack of 6 1-Pound Bags A great alternative to chlorine based shocks; unlike chlorine shocks, bathers can return to the pool 15 minutes after applying shock oxidizer Shock oxidizer puts the sparkle back in the pool water while oxidizing organic contaminants; clears cloudy water Shock and swim 15 minutes later Rids pool of chlorine odors Water treatment immediately clears pool water and eliminates chlorine odor