EHEIM reeflex UV -steriliser with a new kind of reflector technology. 1.8 times more effective with less energy,The new Eheim Reeflex UV provides perfect results with lower energy consumption.Eheim Reeflex UV Sterilisers feature internally fitted high reflection aluminium which reflects the UV light and ensures highly efficient sterilisation. There is no efficiency reduction in the filter due to the special construction of the UV steriliser (no distortion of the water through flow).