Ok so I agree that you have to be prepared to have a large pond, not tank, take into consideration that the alligator snapper shell can reach 3 ft. then take into account that there tail is as long as there shell (= 6ft) + the size of there head at that size can be a 1ft+ so your looking at a 7+ft turtle thats big and they can attain a weight of 250+lbs.
Ok amphiboy- revel yourself... how do you "know me"? where are you from?