The UltraLife Standard Ultrazone-DUAL' UV & Ozone Generator naturally removes organic decay as well as proteins and pollutants while generating excellent water quality; thus, providing your aquarium life with a cleaner atmosphere, improving the superiority of life and reproduction. The ozone passes oxygenated molecules through the existing light source, which even increases a prolonged existence of your marine life by removing many harmful organics. The same light source that is used to produce ozone is enclosed in a special quartz glass sleeve which then generates UV Light. As water passes by, your aquarium will obtain many benefits of UV sterilization. Constant UV & Ozone production is an option, or when used in conjunction with an ORP controller; both the UV and Ozone production may turn on and off routinely as the controller calls for ozone. Beneficially this generator does not require an air dryer and it is safe with low maintenance. It is even known for its high performance praised by many aquatic hobbyists.