I almost positive my CK is sick. He has been very lathargic with his meals as of late where as before he would dash at food stuffing himself like no tomorrow. The fish will sort of slurp a small portion of food up if at all. Before the CK would try to fit as big of piece as possible in his mouth. The fish has also been bouncing off the rocks and at the surface. Would this be an indication of internal parasites?