Hi Jason

If all of the suggestions given so far fail. Just hit him with a big stick. While he recouperates the other will have adjusted.

Ha Ha

Tom R

I'm scared he would pull the stick out of my hand and hit me back

hey Your back. How was the fishing trip. How is retired life treating you?

J

What fish would you like to add to your tank?
What kind of fish did you attempt to add?

I have a yellow tang in my 230g that is a real jerk and has killed one bannerfish that I tried to add. I did try the "Anthony egg crate method" but he just waited it out and attacked as soon as the fish was accessible. If you can catch the jerk (which I was not sure I could) you could try to relegate him to the sump while the new fish stakes out his territory and then add him back after a couple of weeks and then he would be the "newbie"

fish
 

The best way is take the bully out of the tank for a week keeping him in a small tank or tote.When you put him back he should be quite mellow.I do this in my 255 fish only.I t works every time.