My fish community gets along really well at the moment in their 280 gallon. After trouble with a yellow that I had to rehome , I had decided one tang only, so I picked my favorite, a hippo tang. Have had it for about a year and half. Before the hippo I had a powder brown which I really loved but the yellow tang tore it up. Walked in lfs yesterday and saw a beautiful small powder brown. I know these are less aggressive than powder blue and in my experience more docile than a yellow also. My hippo is about 3" and the powder brown is about the same size. I keep telling myself, be content with what you have and choose something else besides a tang, but can't let go of the idea it might work out. Needing to hear some horror stories to keep me from trying mixing tangs again.