Brian I had one of the ebay cheapo ozone generators. Worked for a few months
Stick to a decent brand like the Red Sea, or even better the Ozotech units. You will be much happier in the long run. I have an Ozotech Poseidon Jr. now that I love.
And if I do have any problems with it theres a real company for support-not a chinese importer who sells junk on ebay.