I have a chance to get a tem that has out grown a friends tank. But I don't know if my tank is even big enough, I have a 500 8'x30x4' tall. I know in the wild they can hit close to 40 but what will he max out at in a tank? Right now he is 20-22 inches and if I take him ill have to find another tank to finish growing out my orinos but it would all be worth it if I find out my tank is big enough for a tem