With the Bioforce Revolution 14000 we now finally have a pressure filter good enough for koimixed fisheries. A huge volume of 21000 Litres 4600 gallons cna be handled by this set 14000 litres 3000 gallons if you are keeping koi.The prime breakthrough with this filter is how you clean it simply by turning the external handle an internal paddle effectively cleans the sponges.In this set you also receive the PondXpert FreeFlow Pond Pump boasting an 8mm solids handling capability and 8000lph hour flow rate but only 70w running costs.