SpaGuard Enhanced ShockSpaGuard's Enhanced Shock provides spa owners with a powerful, effective shock treatment to eliminate contaminants that build up with use, while taking just 15 minutes to work. Oxidizers break down and remove organic compounds and their odors, as well as featuring a clarifier to help the filtering system detect and remove particles that remain. Enhanced Shock is compatible with chlorine, bromine, ozone, and ionization sanitizing systems, as well as