Ok i was exaggerating a bit but i didn't say he woud grow to 5' i said he would grow to the size of you tank, he will grow to about 3' though. If you have the space and money for a monster tank though thats cool, but i'm one of these people that believes you shoud get the tank before the fish.Lol!! I haven't checked this thread in a while, but I do know what i have and I have been upgrading as they grow. My pacu's will get HUGE (got some major plans for these guys), but a Silver Aro will not grow to 5 ft :screwy: