So my lfs has has 4 temensis about 3" for $49 each, and 4 monocolus each of which were about 3" for $25 each. They have had them for about a week and a half now and they look good and all seem to be eating. So my question is can i mix these fish in one tank or do they have to be kept separate? the tank is 72x36. also is this a good price for these fish?