considering that you will probably be buying juveniles it will be hard to pick a gender anyways, so just pick out a couple nice ones and if they grow up together, are never fed live food, and are given enough hiding places they should be fine.
DeRo316 said:If you buy them all as juveniles you should have less aggression issues as they grow older. If you notice certain ones being more aggressive, take them out and trade them in.
blkwdw13 said:That's what I was going to do, I was going to have my LFS order them for me so they all came in at the same time.
DeRo316 said:Ask them what their policy is on returns. Make sure they will take back any fish you would like to return in the case of behavioral issues.