I have a brichardi colony with mbuna. Brichardi can really hold their own, and I even have very young brichardi fry in the tank. I have been advised to move the mbuna out of the tank by my LFS becuase they will cause terror, however, I haven't seen it yet. I have 4 mbuna in my "all tang tank." They are now preparing to mate, and they still haven't bothered the brichardi. :wink: Go for it!