The Lotus Green Genie 6500 has always been a bestselling pond filter. With an enhanced 18 watt UV (16 watt previously) it promises clear, healthy water for ponds up to 6,500 litres (this figure is reduced to 3,000 litres if keeping koi). The filter has its outlet at the top meaning it can be partially buried if required. It also includes a 20cm long outlet pipe which is useful when deciding where to site the unit. Note: Colour of box filter changing from green to black over the course of 2019. NOTE: UVC bulb included.