Description Barley Straw Extract Liquid Barley Straw Extract contains active ingredients derived from barley straw. This liquid formula also eliminates the need to use unsightly pellets or bales of barley in your pond. Decomposing barley straw has been shown to provide low doses of hydrogen peroxide in the water in the presence of oxygen and sunlight. Liquid Barley Straw Extract begins to work faster by immediately starting the decomposition process. This provides a safe, natural way of improving water quality in ponds. All-natural liquid formula – safe for use with aquatic life and pets Keeps water clean and clear Easier to apply and works faster than bales or pellets For best results use with All Season Bacteria Directions for Use Apply 2 fl. oz. per 1000 gallons of pond water every two weeks during Spring and Summer.