I know it's kind of an old post, but for what its worth: Don't they make oxygen tabs for bait buckets? Plop one in and shake the hell out of the fermenter while the tab is fizzing in the mix

. Not sure of any harmful chemical byproducts the bait tabs may put off. They may eventually kill the fish at the end of the day. I’m poor, so my budget doesn’t allow for that kind of experimentation.