His fins are looking excellent! His color looks normal so I wouldn't be concerned with the change. Totally looks like a different fish than the one from the beginning of this thread. Good work!
He does look good, huh? I took those pics the day I got him back - it's been almost a week now and his colors have gone back to being primarily blue - so maybe the transfer just stressed him out a little (when I went to pick him up, he was already in a jar and the tank empty so I could drive him home, so I don't know what his color was prior to being put in the jar for transfer.