Barley Straw is a natural alternative for treating cloudy water in decorative garden and fish ponds. A clear netting holds the barley together without detracting from or harming the pond plants and fish. Place bales on the surface of the pond, preferable near waterfall or filter outlet. Each bale package has a cork float included. Do not allow bales to sink to bottom of pond. Allow one month for the bales to become effective. After five months, place new bale next to the old one and then remove the oldest one at six months.