Cloverleaf Genesis 9000 Koi Pond Filter with ADTEC SYSTEM Ref: VH2/4AS Size 2130 x 510 x 630mm. Suitable for Koi ponds up to 2,250 gallons (10,125 litres), or Goldfish ponds up to 4,500 gallons (20,250 litres). This 4 Bay unit comprises of a first stage vortex bay, with Bay 2 being fitted with mechanical brushes, Bay 3 acting as a main biological bay with its "Flocore" medium , and Bay 4 serving as the secondary biological/mechanical stage - incorporating foam and the highly proclaimed aqua rock/alfagrog. With 4 bays offering the best of all worlds this unit is highly recommended. Note:- Pipe inlet size 110mm (4") - Outlet 82mm (3"). Price: £959.34 (Including VAT at 20%)