Top class external filters for aquariums up to 1200 litres,Square basic shape for large filter volume and high stability,High water through flow performance with very low energy consumption,Flow rate adjustable Very quiet running and long service life due to high performance ceramics in the pump mechanism,Integrated self priming aid to initially prime the filter,Safety hose adapter; can only be removed when the hose taps are closed,Large prefilter traps larger dirt particles, lengthening cleaning intervals of the biological filter media; simple to remove and easy to clean,Individually removable filter baskets for filling to suit individual requirements.