Eheim UV Sterilizer Reeflex 500The EHEIM Reeflex UV 500 is a highly effective UV clarifier unit for fresh and marine water aquariums from approx. 300 up to 500 litres. The EHEIM Reeflex UV clarifiersuse UV C radiation to clean aquarium water in fresh and sea water aquariums and are operated in the filter systems water cycle (discharge side) or by using a separate circulation pump (not included). Aquarium water permanently flows through a glass tube and past the UV C bulb inside the