The Bioforce Revolution features a patented, easy clean system and is combined with a 3 step filter process to offer Clear and Healthy Water Guaranteed: Suitable for ponds up to 9000 litres High power 24w UV Clarifier eliminates green water Mechanical Filtration CypriCube foams with +50% surface area ensure clear water and facilitate easy cleaning mechanism Biological Filtration – Large surface area Kaldnes K3 biological media, accommodates beneficial bacteria in a bug bungalow to maintain healthy water No fuss cleaning system – No more dirty hands simply turn the handle to activate the internal cleaning blades that separate solids from the Cypricube foams. Pressurised filtration without clogging or flow loss unique Cypricube foam filters effectively remove waste but do not clog like traditional foam filters. Below is a video produced by Hozelock that demonstrates how the Bioforce Revolution 9000 works: