Well I don't know about the ozone burning my plants, it is adjustable so I can turn it down to start and work up. Why would it burn them to have more o3 in the air? I don't think the ionizer will create dust, in my experiance with this machine in a regular home enviroment, it helps keep dust down. It ionizes the dust particles so that they fall to the ground, or stay on the ground.
The problem I have with carbon filters, is that they seem inconsistant, unless you buy a huge one. I have met several people that grow and have fairly small grows, and their carbon filters don't really fix the problem, they all resort to other methods as well.
They are also ungodly expensive for something that will only last a year.
I have another air purifier which incorperates a carbon filter. I am going to give this a try as well, I just don't know how long I'll have it, its for sale on ebay.
If non of the solutions wrok well enough then I'll have to break down and get a carbon filter. I just want to avoid spending the money if possible. The way I am gonna be running my vent on my light hood would also make it difficult to use a regular carbon filter, which is part of why I'm looking for other options. I also thought that Ona was an odor eliminator, not just a cover up. So the bucket system seems like it should help to remove the smell, not just cover it. My grow tent is going to be pretty much sealed except for the exhaust which will be pulled through the light, and out the ducting. It will then just have a passive intake anywhere the air can get in.