Lance's 225 gal tank

[Lance]

My nice mellow Foxface is a Dr. Jekyll/Mr Hyde. He lived in my 90 gal for over a year and was a model citizen (except for the occasional nip at the corals and feather dusters). Now he's in the 225 gal and turned into a real SOB. He won't let the Tuskfish and Chocolate Tang out of their cave. When I feed the Tusker with a feeding stick he attacks him and steals his food. At feeding time he spends more time chasing other fish than he does eating.
Anybody else have a similar problem with this fish? If I banish him to the QT for awhile will he settle down? Suggestions?