Ok so very soon I'm going to be getting my first ball. I've done a ton of research and got it all pretty bunch down on how to care for these guys. But my question is that my buddy has a 15 gal that he said I can use. I know everyone says a 10 gal is the right one for babies and any bigger will stress him out but will the extra couple of inches really make a difference and how long will I be able to keep him in this before I have to upgrade to a bigger tank.