Algaecides

If pond plants aren't working to keep algae under control there are a number of fish and plant safe aquatic algaecides. Algaecides can be used to kill string algae, blue/green algae, blanketweed, etc... Some algaecides such as Green Clean work on contact, while other such as Algaeway can be used both to kill the algae and control the growth of new algae.