Hydro-Logic FBA_HLSTEALTHUV Sterilizer Kit, 1/2" Assures 100% of bacteria and viruses in water treatment system are sterilized Kit comes with ballast and clips Ultraviolet sterilizer keeps your water filtration system in tip top shape Assures 100% of bacteria and viruses in water treatment system are sterilized Ultraviolet sterilizer keeps your water filtration system in tip top shape