I got my 3" Fahaka a week ago, and he's been eating SO MUCH. I give him a mussel, and he'll also eat a whole 1-2" crayfish and some small snails (about one or two centimeters.) I'm afraid that he'll overeat, but I don't want to starve him and stunt his growth either. Any feeding suggestions or body shape examples of what he should or should not look like? Thanks!