This is a perfect solution for goldfish ponds of up to 30,000 litres 6,607 gallons or mixed fisheries including koi of up to 15,000 litres 3,300 gallons. The compact multi bay box filter employs foam cartridges, brushes and flocor media to ensure your dirty pond water is thoroughly filtered. It has a powerful 50w uvc unit built into the lid to keep your water clear of green water and is a doddle to clean as it utilises a quick action back flush. A full de sludge is also possible via a simple hose attachment all filter media is held above the filter floor so valuable friendly bacteria will not be harmed by this process. The hozelock pond can handle solids of up to 10mm and has very low running costs just 95w skimmer not included in this set. Br br this set contains the following components please click links below for more information br • hozelock aquaforce 8000 pond pump note hose and clips not included when purchased in this set br • lotus clear pond 50 box filter br br saving made when compared to buying items separately.