I just got back from a LFS that has a Silver Aro for 100 bucks, its really close to 2 feet long, if not more. Is that a pretty good deal? it looks pretty healthy with only slight drop eye. I currently have 1 silver aro that is about 11 inches. Would it be ok to put them together, and if so would a 7.5x3x3ft tank house both of them for life? thanks in advance everyone! 