Soaking in Garlic

[Ruth]

I have a Yellow Tang in my 230g that is a real SOB as far as agression goes - it's actually by SOB tank because I also have a dottyback that acts ignorant as well.
When I have tried to introduce fish in the past what I have had to do is to build a box or cage out of egg crate (roughly 20" X 20" X 15") and put the new fish in there for a week or more until until the YT got used to it. It worked to get my Hippo Tang in there but did not work with my Moorish Idol. Fortunately I had another large tank for the MI. Ideally you would want to catch the resident fish and put it in the cage but in my case it was impossible so I ended up putting the new fish in there and feeding it separately. Like I say the YT eventually ignored the Hippo that it wanted to kill but never did take to the MI.
Anyway just a suggestion until your PBT makes itself King.