Demasoni would also get bloat if they ate too many meaty foods. The mbuna and the tropheus eat the same thing so there are no diet issues.
:iagree:. The issues here are aggression and space. Both of these species are very aggressive toward conspecifics and you need at least 12 of each to spread that aggression. Then with this high number needed, you also need a large tank space for them; as stated above.