SuperFish TopClearA unique 3 step pond pressure filter. Filter foam provides mechanical filtration. Bacteria in the Bio balls provide biological purification. Built in UVC provides algae control and disease prevention. All connections on the lid. This allows the filter to be almost completely buried or concealed next to the pond. Placement below the water level is possible with this pressurised design! TopClear 5000 Max pond content 5. 000 Litre Max pump capacity 2.