CMP EC-20 DEL Ozone® 50 Ozone Generator for Inground Pools up to 50K gal 120/240V . The DEL Ozone 50 provides clean, clear and safe water for pools up to 25,000 gallons. This unit destroys 99.9% of harmful contaminants, including chlorine resistant viruses and bacteria, as well as chloramines that cause eye and skin irritations. The DEL Ozone 25 also oxidizes inorganic compounds, such as lotions and perfumes, as well as calcium and iron substances. A Mixing De-Gas Vessel (MDV) is also available for this system to eliminate bubble noise and visibility.