I did the brichardi thing in a 29g thing once and it's pretty cool. Started with having 6 sub adults as the only inhabitants. Eventually it was clear that I had 4 males and 2 females. This led to having two pairs that spawned like mad. You can probably guess what happened next. The other two males got a beating and had to be removed. Later, the two remaining males got into it so I was down to one male and two females. My point is that in a 29g you'll likely only be able to have one male and the rest females. Not really a big deal since the females are attractive too. Just saying that you'll enevitably need to remove some victimized males as you go. Expect fry. Brichardi will breed in toilet water lol.