Mr Crazytang,
I have been running a 75Gal. reefer with a yellow tang and a blue hippo for over 2 years now with NO PROBLEMS. I do have alot of rock (over 100lbs) for suitable hidding places and only have a royal gramma,flame hawk in the tank with them ! Never had a problem with stress and feed lightly, use Seaweed Selects on a daily basis.... So I dont know, its always a learning experience I geuss, the general opinion is not to do it though !