I also had an offer for some brevis m'toto. I was wondering how many of those could be kept in a 29 gallon? Also how many if i was to get a brichardi or a pair of calvus?
What about 1 male + 2-3 females and a pair of one of the smaller julodochromis (sp?) species? Maybe you can keep more but if you provide the right water conditions they will most likely breed so you will get more eventually.