I've got a 120 gal mixed reef that has a 3-4" inch yellow tang that while dominant, does not appear to be a bully. It will posture against my melanurus and pink margin wrasses and female clown, but never any fighting. That said, I don't have any other tangs in my tank. What are my odds for success for adding a kole tang, assuming I use an acclimation box and a 3-day lights-out period? Thanks in advance for the input.