Cloverleaf Compact 1500 Koi Pond Filter Ref: VH2/1 The VH2/1, size 510 diameter x 630mm high, which is suitable for Koi ponds up to 750 gallons (3,375 litres) or Goldfish ponds up to 1,500 gallons (6,750 litres). Note:- Pipe inlet size 40mm (1.5") - Outlet 50mm (2"). Price: £212.15 (Including VAT at 20%)