Applied Biochemists Swimtrine Plus Kills Green & Mustard Algae 1 Gallon P/N: 406104A Swimtrine Plus algaecide is a highly concentrated copper based algaecide especially designed to kill mustard and green algae. When used regularly, it also prevents the regrowth of all types of algae. Swimtrine Plus algaecide contains 9.3% active copper content - making it America's most concentrated fast-acting algaecide. Features: Triple chelated copper formula stays active and provides algae control between treatments *Effective over a wide pH range *Will not foam *Does not clog filters Tips: Swimtrine Plus algaecide is a one-step algae control system. There is no need to add large amounts of chlorine or adjust your pH. Its unique chelated formula keep the copper active and in solution, working to kill and control algae for an extended time. Compatible With: Bromine, chlorine, and ozone. Do not use with pools sanitized with biguanide products. Dilute with at least nine parts of water in bucket before applying. For visable algae: Apply 3 oz. per 10,000 gallons. For prevention of algae: Apply 1.5 oz. per 10,000 gallons every other week.Pour solution around the edge of pool where algae occurs. It is best to apply solution in the morning on sunny days for maximum effectiveness.