The OASE SwimSkim 25 In-Pond Skimmer enables fast, simple and safe removal of coarse debris that falls into your pond. Better quality pond water is achieved thanks to the integrated oxygen injector, as well as the powerful pump. This water circulation means that the SwimSkim 25 remains protected from being frozen into the pond during the winter months. Since the SwimSkim 25 floats on the surface of the pond, it easily handles even the most abrupt water level fluctuations.