LTM 2oz Renew Non-Chlorine Shock Renew is a non-chlorine shock treatment. This fast-dissolving granular rids spa water of residual soaps, deodorants, natural oils and organic materials that can build up in spa water. When Renew is added to the spa water, it reacts with the bromide and forms a bromine solution to destroy any microorganisms left behind by the bather. Part of the Reserve & Renew® Chlorine-Free Sanitizing System. Quickly dissolves in water to rid spa water of oils and residue. Eliminates organic materials that cause odors, skin and eye irritation. Use spa minutes after application. pH buffered so it does not effect pH level. Buffer potassium monopersulfate compound Formulated with DuPont™ Oxone®