i agree, not that i wouldn't keep an aro in a 180 (6x2x2) or even 150 (5x2x2) and a lot of people do keep aros in 180s, but to be really fair to the fish you should at the very least give it a width of the fish's maximum length
i agree totally with rottbo as well, however i dun think many aro's get that kinda treatment for the sheer fact that the size n weight of the tank needed is ridiculous and 99% of people dun have the funds or room to keep a tank of that size..
An aro in captivity more than likely wont grow over 3 ft. A 180 is a little tight but could house a large aro IMO. Delgado's near 3 footer seems quite happy to me!
uh my 110 is just to grow them out they are going into a large pond in the basement smart *** maybe you should read my posts before running your lip in a week they are going into a 8' diameter pond untill the big raceway is done i just have to make sure that mt floor will hold all the weight