Barley Straw Concentrated Extract by Microbe-Lift
For the prevention of string algae. 8 oz. bottle treats 6250 gallons on a maintenance basis.  During 1st 2 weeks, use 1 oz. per week.
AG20068E -- $ 16.95   / 8 oz. bottle treats 6250 gals on maintenance basis
AG20069E -- $ 26.95 / 16 oz. bottle treats 12,500 gals on maintenance basis