I have a 6' x 3' x 2' tank that is approximately 250-270 display gallons. I would like to keep a Unicorn Tang, but I get mixed answers everywhere I look. I understand that these fish get to be absolutely enormous hunks (2ft) I would definitely find a way to rehome one if it did reach that size. Would I be able to keep one in this sized tank? If so until how big would one get before I needed to rehome it? I understand that they do grow fast, but in general how fast do they grow?