If you want to install a fountain, waterfall or stream, it is important that the pond water will become and remain crystal clear. Clear Control pressure filters can withstand high pressure and the water can bridge a difference in height after the filter. The Green Line pond pump has a large capacity at low energy consumption. Easy installation Connect the filter to a dirty-water/pond pump for the circulation of pond water. Use a filter hose to connect the pump outlet to the inflow of the filter. Attach a second hose to the outlet of the filter for backflow to the pond. Place the filter next to the pond and lower the pump under water. Activate the UV-C lamp and the pump by plugging them in. Read the manual first!