Summit Barley Straw for Livestock Watering Troughs, Stock Tanks, and Ponds naturally keeps pond water clear without synthetic chemicals, and treats up to 1,000 gallons As barley straw slowly decays, byproducts are released that aid in maintaining water clarity. Best results have been reported by people starting in early spring when the water temperature is low. Barley straw should be used weekly to help maintain pond clarity and may be used in aquariums, ponds, fountains, water features, stock tanks, and animal watering troughs.

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