Can be used in ponds containing live plants and fish! Helps control "green water" algae blooms, string algae and blanketweed (Oedogonium). Keeps ornamental ponds and water gardens clean and clear. Kills existing algae and controls additional algae blooms. Previously, all algaecides were nonselective and killed or damaged all plants in the pond along with the algae. Pond Care offers an effective, E.P.A.-registered selective algae control product that solves green water pond problems. AlgaeFix® cures green water problems and it is designed for use in ponds with plants. Plus, AlgaeFix® is EPA approved for use in the US to control blanketweed! 8oz and 16oz bottles now feature a convenient dosing cap for precise measuring.