I just got 2 Red Marlboro Discus and they have not eaten much since arriving two days ago. Maybe I just don't notice when they are eating, but it seems as if one will nibble on the flake and then spit them back out, and the other wont eat period. I've also tried special chiclid pellets and they wont eat them either. Is this normal? Are my fish just not hungry? Any help would be great!