Banish - officially accepted by the U.S. Environmental Protection Agency - is a patented, non-staining pool algaecide specially formulated for use in chlorine or bromine-sanitized swimming pools of all surfaces and filter types. The product's scientifically advanced formulation makes Banish the best choice for killing algae in chlorine and bromine pools. Banish is no-foaming and requires no pre-dilution or pH adjustments before or after treatment. With its non-staining technology, Banish can withstand large additions of chlorine to satisfy chlorine demands during treatment of algae problems without staining concerns.