BioGuard BANISH (1 Quart)
A fast-acting, highly effective, patented, non-foaming algicide that produces results in 24 hours. Kills all types of algae in swimming pools. Also, Banish contains a patented chelant that prevents staining that commonly occurs with other copper-based algicides. Banish is formulated for use in chlorinated or brominated pools of all surface and filter types.