EHEIM LOOP5000 Complete kit with continuous filterAll components are perfectly matched to each other and require very little maintenance: connect, turn on and enjoy! Crystal clear pond water and the best possible living conditions for plants and your fish! The 4-stage mechanical-biological process of our LOOP filter system takes care of this in a natural way: it automatically routes the water through several layers of filters as well as the integrated UVC clarifier, before it flows back into your pond, free of algae and impurities.