I was wondering if all the medium to large angels are all aggressive? I'm looking for 2 more fish to add to my 220 but not sure what to add. so far im looking at yellow tangs, blue or naso tang, flame angel, and poss. a grouper-blue line. I have to stock my tank (around)my prize fish my brownbanded bamboo shark,he or she is 9''. I also have a sailfin tang, 2 sabae clowns, and a ****** trigger. If anyone can think of something that would be a good choice please let me know,I am tring to stay away from eel due to waste and eating habits, which is why i prob. wont go with a grouper also. Thanks for ur time and advise....