This silvertrine algaecide eliminates tough black and mustard algae. Odorless and non-foaming. Will not damage tile, concrete, metal or plastics. Improves filter operation. Tasteless, odorless and non-foaming at pool concentration and may reduce other chemical usage. Non-staining formula treats twice the volume of water as other silver algaecides, so can you use half as much. Applications is, see product label for complete application instructions and dosages. Compatible with chlorine and bromine sanitizers