At last an affordable easy-clean large pressurised filter. Simply turn the handle on the top of the filter and it will vigorously flick the sides of the internal filter sponges dislodging dirt & debris. The dirt exits the filter via a dedicated waste outlet - uniquly this is tapped so there are no more leak problems! The large filter chamber is packed full of top quality foam media and this along with a powerful 24w UVC means the filter can be used for large ponds up to 30,000 litres. * Note: pre-2019 models require 18w (single-ended) bulbs. NOTE: UVC bulb included.