I just got him a couple of days ago. He's just a wee little guy, maybe just over an inch to one and a half. All he does does is hang out in the back of the tank staying hidden. He floats there in a "head-up" position (about 30 - 45 degrees). I've seen him eat once but had to coax him out of his hiding place. When I fed after work today he would not even come out with coaxing. Getting worried about the little guy.