Can I keep Peacocks in Lake Tang community tank? Since they are not very aggressive and require similar setup and water parameters, I don't understand why not. If there is difference in feeding, I don't think it is a serious obstacle. Am I right?
there is no easy straight answer to this question. first off, i've been keeping cichlids only for the last 2 months. so please research anything i say. but from what i've read so far, the two principal requirements for any fish are - food and spawning space (well, barring good water quality). and most cichlids from the two great lakes clash in both of these issues.
while you can provide the same food to both these kinds of cichlids, usually, the tang ones are more shy than malawi ones. so, the peacocks would probably hog the food during feeding time and the tangs would slowly starve.
also, since the peacocks are mouth-brooders, the males can set up a spawning site and mate literally within hours. but tangs being mostly substrate-spawners, there are elaborate arrangements to be made and a larger territory staked out.
however, with careful selection and aquascaping, it might be possible to mix the two and maintain both species in relative harmony. but to do so, you need some expertise to look for small signals when things might go wrong and act accordingly. i have little knowledge about malawi's and none about tangs. but i'm prepared to learn and am prepared for the long haul. so, some day in future, i may be able to give you more specific advice. but for the time being, i'd recommend sticking to a specific lake in a tank.
If I could keep them together, the diversity would satisfy my fish-keeping "apetite".
of course i agree with you. but please think about the fishes who might have to sacrifice their 'appetite' or natural behavior to whet yours.
again, i'm not discouraging you to keep them together. a lot of people do that with relatively high amounts of success. but i'm just asking you to learn a little more about the fishes you are going to keep to make them all comfortable.