my p has slowed down on the eating, only taking one or two feeders at a time, and he is very picky on what size they are. just about a week ago he would eat no matter what size and eat four or five at a time. somedays he will refuse food. lol, there are like 5 rosey's in there now that he will not touch. is this normal. my tank parameters are normal and the temp is at 85.