I'm done debating this one, seem it's getting kinda derailed. RyanR you've got veiws from a couple different members, so you may have to research this on a little more yourself. My recommendation has been stated in post #4. If you do infact have larger tanks to move them to, then get some and you'll find out how long you can keep them there. With proper feeding and water changes there is no way your going to stunt the growth of a under 5" fish in a tank that measures 30" x 12" X 19". And I'm sure that once they are 5" you be move to the larger tank.