"A granular chelated copper algaecide.Controls algae before it reaches the surface.Ideally suited for bottom growing algae and spot treatments along docks, beaches, boat launches and fishing areas.Do not use in waters containing koi, hybrid goldfish, or trout or if hardness of the water is 3.7% Copper From Mixed Ethanolamine Complexes.Size30 POUNDColor "BCI - 076240