Liquid concentrate barley straw extract specifically formulated to naturally balance pond water and improve clarity. Goes to work on contact, decomposition begins immediately, no messy residual. One bottle is equal to multiple barley straw bales. The chart below is designed for first time users. After initial dosing the product goes considerably further. A Liquid Extract of Barley Straw Especially Helpful Where Bottom Drains Are Present. An environmentally responsible, cost-efficient pond conditioner that is a clean & easy, natural & organic approach to a healthy pond environment.