By the way you can also do enemas with sodium butyrate, that is such a short chain fatty acid. If your pouch is disconnected not far from the entrance then the enema should reach everywhere.
I read about a UC patient that added probiotics to such an enema, but I myself had only the content of 3 capsules of sodium butyrate 600 mg (BodyBio) mixed with water on few occasions when I tried to treat pouchitis some years ago. Most times I ingested them which is easier (but does not make sense in your case).