If you go with the small tetras I would suggest making sure the tank is medium to heavily planted to give your betta places to hide. Some bettas sometimes aren't fond of small, fast moving fish in a smaller tank. So keep an eye on him to make sure that they don't stress him out.
Breeder so I have too many to count and too many named to list here!
Last edited by Myates; 11-07-2011 at 11:02 AM.