AquaZone 50 - 50 mg/hr with 250cc Air Drier Applying ozone to your tank raises the ORP, increasing oxygen levels and decreasing dissolved wastes; ozone also effectively kills numerous harmful pathogens. AquaZone ozonizer`s corona discharge technology provides higher ozone concentration than UV bulb style ozonizers and allows variable ozone output. Just dial in the amount of ozone that your tank needs! * State-of-the-art Ozone Generator for home aquariums. * 50 mg/hr variable output ozonizer. * Utilizes high frequency switching technology * Designed for use in a humid environment * No regular maintenance required * Interface with all Redox (ORP) controllers. * Includes 250cc Air Drier Units are just 1 1/4 lbs. and 6 5/8"L x 6 1/4"W x 2 1/4"H. 1-year manufacturer`s warranty from date of purchase.