Flumigard Aquatic Herbicide provides fast control of tough invasive plants such as duckweed, watermeal, fanwort, hydrilla and more. Flumigard Herbicide is very versatile and breaks down quickly in the water leaving no accumulation in the sediment. This EPA registered water dispersible granule contains 51% of the active ingredient Flumioxazin, the same active ingredient as the now discontinued Clipper Herbicide'. Ideal for controlling vegetation in ponds and lakes and is effective in slow-moving or quiescent waters such as bayous, canals, drainage ditches, and reservoirs.