Gravity pond filter with 16 watt UV lamp. Combines UV clarification and biological filtration to guarantee crystal-clear water. Maximum pond sizes: 1500 litres to 6000 litres. Max flow 2500 litres per hour. Water returns to pond under gravity. Contains Supra bio media. High efficiency UV reflector with large capacity UV chamber. Hinged lid for easy maintenance. Inlet sizes 19mm and 25mm. Outlet sizes 38mm x1 or 2. 5m power cable. Size (H)18.7, (W)26, (L)40cm. Weight 2.53kg. Manufacturers 3 year guarantee.