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Yes it shuold be ozone ready, you need a 220v CD corona discharge ozonator with a J&J plug on it. If you look on line you can find them, and most distributers offer different plug configurations. Also on a side note my tech had to replace a flow switch on a new 400 series the other day, I have not ordered the new style in yet(with the plug). Anyway he removed the bad one, put an older style one in and spliced the wires together, it worked fine! And you know what it didn't void the warranty