This filtration system is big enough to suit koi ponds with a volume of up to 4,500 litres and goldfish ponds up to 9,000 litres. This pump and filter set is comprised of solid componenents to create a system that will provide years of fuss-free pond enjoyment. This set contains the following components (please click links below for more information): • Pontec Pondomax 5000 pond pump • Hozelock Ecopower 10000 box filter * Saving made when compared to buying items separately.