BIO-DEX AP04 1 gal Aqua Pure Algaecide.

Aqua Pure Algaecide is a unique copper/quat formula for eliminating algae in all the common colors and forms. This formula helps prevent copper staining, which is common when using other copper algaecides. Aqua Pure creates sparkling clear water with a beautiful blue brilliance. This product treats mild to severe algae problems and helps prevent the return.