Aquascape Barley Straw Extract is extremely concentrated and goes to work immediately to help clarify pond water and reduce maintenance. Traditional barley straw in the form of bales or pellets is effective, but takes up to six weeks to start working. As traditional barley straw starts to decay, it releases enzymes into the pond helping clarify pond water, often resulting in a mess. Aquascape Barley Straw Extract provides all the benefits with none of the mess.