Ian’s pond is a brick built , fibre glass , rectangular pond, of 4000 gallons, which is up to 6 feet deep, Covered by a pergola. Two 4inch bottom drains feed a large bespoke filter sytem, gravity fed to a vortex, into a large bay of 20 plus brushes, thenthrough two large bays of jap matting and finaly through a large bay of alfafrog. Seperate skimmer filter system, two airpump systems and venturi returns