oh yea we know it will get big.my husband brought one back from florida once and it got BIG.Ryan our 16 almost 17 year old is very responsible.so far he is really doing good.right now he has it in a 20 gal. but he knows he will have to get a bigger encloser.he can afford it he has been working ever since he turned 15 and now 16 almost 17 and he dont have anything else to do with his money except pay for his ins on his car.which he has already paid it off.(very responsible young man)