My pacman is only eating every couple of days. When he is full he just won't eat. The pet store says this is normal for a pacman to eat every 2 to 3 days. He looks happy and healthy so I guess he's doing ok. I would feel a little better if he would eat a little everyday but I guess pacman's don't do that. If it is longer than 3 days that he isn't eating he may be too cold. It should be in the 80's in his tank.