Crystal Blue 222 Copper Sulfate Algaecide, Solid, Spray Application, 15 lb Package paint--05-29-26 Constructed to provide shelter for

Constructed to provide shelter for wild birds

Cut Type: Double Cut

less clogs and more efficient system operation

Approved for direct burial in earth and concrete

Strength and durability make Razor-Back® tools the choice of professionals

Crystal Blue 222 Copper Sulfate Algaecide, Solid, Spray Application, 15 lb Package paint--05-29-26 Constructed to provide shelter forAbout This Product Crystal Blue copper sulfate is a great pond algae control product for filamentous or string algae. Copper sulfate should be used as a pond algae treatment on actively growing algae in water temperature above 60 deg F. When getting rid of algae in a pond, it is always important to treat 1 2 of the pond algae at a time to avoid killing too much algae and depleting the water of oxygen. Copper sulfate is safe for most varieties of fish