Ive got a few large airstones running in the quarantine tank, and 3 HOB filters running, so I think it should be okay. I can take a powerhead off of the other tank to add onto it if you think thats a good idea. He was just so weak when I moved him that I didnt want to tire him out anymoreAtleast you have it quarantined so it can't be pestered and also importantly it can't feel threatened.
Good news the eye has cleared up, i imagine he'll pull through now, fingers crossed.
Have you got plenty of oxygen in the water?