The superfish TopClear filters are a unique 3-step pressure filter designed for usage in ponds. In the first step the filter foam provides mechanical filtering, helping to remove debris and larger particles from the water. In the second step the bacteria within the Bio-Balls begins to purify the water by breaking down the waste products. Finally, the built-in steriliser provides control of algae, helping to prevent disease. Max Pond Volume- 5000L Max Pump Capacity- 2500L/Hr UvC- 7w Inlet- 14/20/25mm Outlet- 14/20//25mm Size- 34x34x40cm