I'm not going to take him back today, but if he starts to out grow my tank I will either upgrade, which i want to do, or just have to take him to the lfs and trade him, right now he is like an inch long, he's not going to be the max size tomorrow, so I can keep him in my set up now and as he gets bigger put him in the 58, and when he out grows that, see where i am with getting a large tank and go from there, but for the time being, he will be fine in the tank he's in now, I just couldn't pass him up, for the same fish, just a little bigger they want 49 bucks, so when the lady said he was only 12, I was not going to say no, worse case take him back when he is at medium size and get more on his trade.