Specially made for landscaper and pond service contractors costs less than bales recommended for use with allmicrobe-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.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.Dimensions (L x W x H):28.25 x 17.5 x 5.75- SKU: BCI13754