Rendezvous Activate is a fast-dissolving, non-chlorine shock oxidizer that quickly destroys contaminants such as perspiration and cosmetics that cause odors and skin and eye irritation. This product will not upset water chemistry balance. It is comprised of a dual action formula which means that this product "activates" Rendezvous Enhance into a bromine sanitizer and it works as a shock oxidizer. Activate is compatible with chlorine, bromine, ozone, and mineral purification systems.