Used with a shock treatment, these fine algaecides are an effective problem solver for Green, Yellow or Black algae. Go-AwayTM Green is a 30% non-foaming algaecide (6 oz per 10,000 gallons). Go-AwayTM Yellow is a 7.41% copper elemental algaecide used to treatmustard algae (4 oz per 10,000 gallons). Go-AwayTM Black is a 60% non-foaming poly algaecide (8 oz per 10,000 gallons).