The Oase Filtoclear 16000 is a feature-packed premium pressurised pond filters with German engineering. This filter utilises the patented Oase \"Easy-Clean\" system: simply agitate the sponges up and down using the exterior handle and the dirty water can be exited to a drain/flowerbed. This new model introduced in 2013 replaced the popular FiltoClear 15000 - it has proved very popular with our customers now as the UVC got a boost from 11w to 24w which has been highly effective at tackling green water.