BioGuard ChemOut eliminates chlorine, bromine, or hydrogen peroxide deposits in pool water. This product is intended to reduce swimming downtime due to high chlorine levels. It will not affect pH levels, so there will be no readjusting necessary after use of this product. ChemOut is also great for neutralizing chlorine or bromine when converting a pool to Soft Swim. In addition, it is sometimes necessary to lower chlorine or bromine levels when treating severe metal stains and when dealing with metal problems.