Ona gel is an absorbing gel for odor, very very effective.
There are apparently different ideas about running ionizers in the same room with your plants, I have read that some commercial grows claim it improves plant development, however I have yet to see any comparisons or studies that explain why. I have not tried it one way and then the other to say from personal experience. And I myself only run an ionizer on the outgoing or exhaust so the ionized air does not directly come in contact with my plants.
I think the smell will come back after you do a proper cure.