Shock by Spa Life contains no chlorine or bromine, and is an oxidizing agent to be used for "shocktreating" only. With regular use, spa shock will oxidize most of the nitrogenous waste that builds in your spa water. This will reduce the overall use of sanitizer. Spa Life Shock is not a sanitizer. This product will brighten and clarify your spa water while destroying organic waste, with an added benefit of being quick and easy.