The Eheim reeflexUV-e+ is a high-efficiency UV sterilizer engineered to significantly reduce harmful microorganisms, algae spores, and pathogens in freshwater and marine aquariums. Its innovative bypass technology ensures minimal flow resistance while maximizing UV exposure for superior sterilization performance. Unlike conventional UV units, the reeflexUV-e uses a built-in electronic ballast for energy efficiency for powerful yet gentle treatment. This sterilizer is ideal for aquarists looking to enhance water clarity and fish health without chemical additives, all within a compact, easy-to-install design.