BARLEY SEED FOR GROWING BARLEY STRAW FOR USE AS A NATURAL ALGAECIDE IN PONDS AND FOUNTAINS
Barley straw controls the growth of algae in ponds and fountains. When the barley straw is placed in ponds, it begins to decompose and releases lignins into the water. The lignins are then oxidized into humic acids, which in turn, produce hydrogen peroxide. The continuous release of hydrogen peroxide stops algae from reproducing and stops growth of existing algae.
Depending on pond size, the straw can be used in bales, sprinkled in water as loose straw or conveniently packed into net bags. The amount of straw needed depends on the surface area of the pond. Approximately 1/3 ounce of straw per square yard of surface area is recommended. More may be used at first if water is already green and decreased once the algae is under control. Time needed to get algae under control depends on amount of algae already present in water and water temperature.
Barley straw is harmless to plants, fish, pets and wildlife.
Cattails are good if your water has pollutants in it they and the bacteria at their roots clean up pollutants.
I wonder if they will serve in my torrent rapid mountain stream that disappears in the summer mounths to block it a bit so that it flows slower and gets wider, i am hoping they will serve as a damn as well as a water cleaner. trouble is get one nice effect lose another. The torrent rushing over stones is pretty. rose macaskie.