Corona Discharge ozone generators produce far more ozone than comparably sized UV ozone generators. The DELZONE ECLIPSE line of CD ozone generators produce up to 5 times the concentration of ozone produced by a UV generator. These Eclipse units produce ozone concentrations reaching 1,350 ppm, while UV generators typically top at about 550 ppm. The DELZONE Eclipse 1-4 units are for in-ground pools with water capacities up to 7,000 gallons (Eclipse-1) 15,000 gallons (Eclipse-2) and 25,000 gallons (Eclipse-4). These units install easily into new or existing pools.