Professional and efficient: Ultraviolet sterilization stick adopts pure physical sterilization method, quickly destroys DNA to kill virus, and causes bacteria to lose reproductive capacity and viability. Safe and reliable: Built-in ballast, safe and reliable. Strong PC protective shell, completely without radiation, will not harm your beloved fish. Effective Germicidal Ultraviolet Lamp: Quartz stone tube is insulated from water and has high medical light rate, it can reduce bacteria and algae, purify water quality and make water clear . Double tube: double light, high UV intensity. & nbsp; Wide radiation range, high lethality, closed design, easy to use, suitable for various breeding of ornamental fish, aquatic plants, etc. Easy to Install: UV Aquarium Germicidal Lamp has a variety of installation methods to choose from.