Ok I was looking up info on P. pardalis and some sites say it gets 12" but the majority say 18". I know they cant get 18" so thats not really the issue here. Ive seen this while looking up P. gibbiceps as well but why is it that they all say the min tank for these guys is a 55gal??? I thought a 55gal didnt have the depth required for these giants to properly turn around. Am I missing something here???