Oase SwimSkim 25The Oase Swimskim 25 skimmers powerfully and effectively extract dirt particles from the surface, collecting them in the basket. This method of cleaning removes all types of pollutants, including an excess of nutrients so that the water in your pond or pool is beautifully clear and clean. A fine grade sponge performs both mechanical and biological filtration to ensure a thoroughly cleansed pond. All of the waste is collected in a removable basket, so