About This Pond Barley Straw Actively Clears Water -- Within six weeks, the pond barley straw bale will begin to decay, releasing small but steady quantities of extract and safe oxygenators, clearing pond water. Works in Water Gardens & Small Koi Ponds up to Six Months -- Barley bales are most effective in shallow water with sunlight and good circulation. Ideal for backyard water features and aquascapes. All-Natural Pond Treatment, No Harsh Chemicals -- The only ingredient is barley straw! The Pond Guy Barley Straw Bale is an all-natural pond treatment that actively clears cloudy pond water. Packaged in Mesh Netting -- Keeps straw contained in a clean mesh bag. To maintain water clarity, we recommend adding a new barley straw bale to the water one month before the old bale is removed. Safe for All Aquatic Life -- Safe for fish, koi, goldfish, plants, birds, turtles, frogs, pets, wildlife, and the environment. No temperature restrictions. Use all year to improve pond water clarity. Overview Brand : The Pond Guy Item Weight : 1.1 Pounds Item Form : Barley Straw Target Species : Turtle Manufacturer : The Pond Guy