Well, my LFS
was wrong and everyone else on earth was right: M. Johannii's are not good tankmates to go with mild-tempered Malawis like Yellow Labs, Ps.Acei, or Peacocks. I noticed he has been a little ornery, but not overly so. Now, however, I'm coming home to find bits and pieces of fins missing from smaller fish. I guess I'll need to try to negotiate a trade or resort to a donation otherwise. Too bad, the Johannii is really nice-looking.
I'll go back to advice I now give to others. LFS
"experts" opinions need to be weighed with the opinions of folks on forums like this one before deciding on a purchase. Unfortunately I was convinced to purchase the Johannii several months ago when I didn't know any better and was in the "live and learn" stage.