The Bio-Qube 800 unit has been designed for ponds up to 5,000 gallons and the 800 unit for ponds up to 7500 gallons the 600 & 800 units also have integrated U.V clarifiers which eliminates the need for an external unit. This Provides the Bio-Qube with another important feature (footprint) being a Cube it has one of the smallest footprints on the market, making the need for large filter housings a thing of the past. Making the Bio-Qube range very cost effective. For further information please contact us on 0121 744 1300. If you would like to arrange to have the unit fitted by our installation team please contact us.