I have a 20G High with 4 multies, they have bred, I have about 6 fry in there as well. Also have a Betta splendens in a tiny bowl (Easter gift). I don't like keeping Bettas in such a small bowl, it's probably about a quart at most. Is it a bad idea to put it in the 20H with the multies? If so, I can get a larger container for the betta. Whaddya think?