Also any tang that is in the same family can not be combined for the same reason as triggers. Triggers can be combined if different species and different color patterns, shape, etc. But a Huma and a Huma Rectangular may fight here and there when young, but as they grow the fights will get more and more bloody. Just because your tangs are fine now, doesn't mean they will be fine in a matter of months let alone years. I do see your opinion slip, and for the most part do agree. Unfortunatly my mother put a yellow in here 75, even though I told her it wasn't smart (my dad was dying desperatly for a yellow tang-we have hundreds of fish, and he wanted the one we didn't have!). The same goes for Scats and am pleased that my three Silver Scats are happy in their new 209G tank. Going from a 55 (the biggest is 4 inches) to the new tank, they are very happy. As to the question about mixing tangs, at the lfs I work at people are always trying to squeeze "one more" in their tank even if it won't work. It is definetly frustrating being told no to something you really want but it is much better for the fish. Sorry but no more than one tang per tank (in my opinion) unless you have a 200+. Sorry!