Blagdon MPF 6000 for ponds up to 6000 litres has 9 watt uv. This unique new design has a very effecient 5 stage filtration system. It is easy to clean via its hinged lid allowing easy access to its foam filter pads and it is quick and easy to replace the carbon and polymer wool filter pod cartridge. Inlet takes 1/2 in 3/4 in or 1in pipe.