This is a popular pond filter for ponds up to 12,000 litres. The Green Genie 24000 pond filter has been available for many years and is always popular. It comes with a powerful UVC to prevent green water and includes a range of filter media to pick up the debris found when dirty pond water enters the filter. This filter is suitable for koi ponds up to 6,000 litres. Note: Colour of box filter changing from green to black over the course of 2019. NOTE: UVC bulb included.