For customers desiring optimal water quality utilizing more ozone, DEL’s high-output MCD-50 has the longest lifespan of any spa ozone generator on the market, typically running for five years.The MCD-50 high output ozonator uses innovative corona discharge electrode technology to produce high ozone concentration levels. It is exceptionally durable while it increases water quality and purity far above previous technologies. The MCD-50 is suitable for hot tubs up to 1000 gallons.