Faircloth Skimmer surface drains for sediment basins release the cleanest water from the surface of the basin instead of draining muddy water from the bottom. Eight sizes are available and have an adjustable orifice to regulate filling and draining to improve efficiency. Skimmers drain the basin slowly over several days at a constant rate to maximize settling. For more information please check out our website at www.FairclothSkimmer.com.