I, sprung a leak in my 350 where I had 12 fish,all were either tangs or angels. I put an egg grate in my 125 to divide the tank in half for awhile and put them in there. There were 6 tangs and angels in there already. At first the powder brown and powder blue would face off thru the egg grate, but I finally just removed it and all the fish just accepted each other. I had 2 blue hippos, 1 yellow tang, 1 brown tang, 1 powder brown, 1 powder blue, 1 yellow eye bristol, and 1 sailfin. The rest were angels, unfortunately my chiller malfunctioned and I lost all , but the sailfin, 6 weeks ago. Maybe because I have lots of live rock for the fish to hide in I was able to do this, I don't know. The good news is I found someone to fix my tank and I am rebounding. GOOD LUCK with your tangs, I luv em, Johne