I took this from a the fish profile here on the forum "These cichlids make excellent tankmates for most mildly and moderately aggressive mbuna, aulonocara, and haplichromines from lake Malawi."
I don't belive in that other stuff that other forum said, although I belive they may be one of the more peaceful mbuna. I really don't think any African cichlids should be kept in a community tank that small, even Kribs have been known to kill community fish and they are supposedly quite peaceful. Did it tell you the minimum size tank for the fish? I hear 30g minimum, and I don't think thats 30g, whats is it exactly? Please try to get some more diffrent things to add into the tank, they need a bunch of diffrent hiding places, and the Yoyo's may also benefit from it.