This large pond filter boasts a 50w UVC to clear away green water. Inside it incorporates multi-layered gradient foam to catch dirt particles with a bed of flocor biomedia to encourage healthy bacterial growth. The Green Genie is a pond filter that has been available in the UK for many years. It has been tried and tested by many pondkeepers up and down the land, offering a strong performance for a highly competitive price. Note: Colour of box filter changing from green to black over the course of 2019. NOTE: UVC bulbs included.