Well,when someone tells you thats large enough your going to say your getting a bigger tank.Enough of the BS.Youv'e already given yourself a bad enough rep,don't make it worse.Your ID sharks will get atleast,2 feet,and with proper care 3-4ft IN CAPTIVTY!And the question is not "if" he is going to get to big.A fish with a maximum size WILL grow to it,it will not grow to your personal preference.Not too many people want an active,fish eating,4 ft catfish on their hands.A CK will get 40 inches,and you know perfectly well that it will.You never see them that large because of improper care from people LIKE YOU!I'm not finished,but I will try to leave it at this....and sydontisjack,I respect you deeply,but I highly doubt he is going to sell it.