Specially made for landscaper and pond service contractors, costs less than bales, recommended for use with all microbe-lift. The direct placement in a pond enhances substrates and the decomposition process starts immediately. It buffers the ph, and provides a slow, steady release of natural ingredients by natural, biological activity. Provides a slow steady release of beneficial ingredients through natural activity. Works years round. Size is 25 Pound. Dimensions are 12.5 X 12.5 X 17.25 Concentrated Barley Straw Enriched With Peat & Humic Acid. Weed Free. Treats 500 Gallon Pond Up To 7 Months And An 800 Gallon Pond For Up To 5 Months. Each Bag Includes A Graduated, Dry-Measure Cup With Both Oz And Ml Measures. UPC Code = 097121341396