Some people might hang me for this but I wouldnt see why you couldnt keep a juvenile pbass or two in a 29 gallon until they reached about 8-9 inches... Its not the best possible situation, but it could be done, but you would have to upgrade from there.. Most important thing is you would have to keep a CLOSE eye on water quality. You would eventually have to go to something like a 180 24" wide or a 240. My tank I have waiting on my guys is 8 foot long and 4 foot wide, but you wouldnt have to have a tank that big for two pbass...