Pool FROG BAM is a special elemental copper algaecide with built-in chelating agents that keeps your water algae free for 90 days. It uses a unique formula which will keep algae from forming whether you have an in ground or above ground swimming pool. Also it contains a low 3% copper complex (considerably lower than any other algae stats) that is specially formulated to stay in suspension for the full 90 days. This unique formula has no staining potential like other copper additives. FROG BAM was designed to be dispensed through the Pool FROG System for even distribution throughout the pool. Combined with the mineral effectiveness of Pool FROG and at least 0.5 ppm of chlorine, you'll enjoy months of algae free pool water!