SunSun CPF-2500 This pond set, especially compiled for small garden ponds up to 6, 000l, includes all the equipment you need for your backyard pond. The compact SunSun Bio Pond Pressure Filter CPF-2500 combines complexe filter mechanisms and high-quality filter media with high-performance UVC water clarifier technology and optimum flow rate. Supported by top-quality filter media like special foam sponges and Japanese filter matting sheets, the biological filter system can develope its optimum cleaning performance. Since all filter technologies are inside the lid of the canister, the filtering system can easily be installed in the ground. Thanks to the pressure pumping performance, the pond water can even reach water falls installed above the surface of the pool and flow back into your outdoor pond.