I am starting to see my Neon's get some funny bends in their backs. 1st I notice that they get a white spot, then shortly after that, they get all bent out of shape, literally. It's like they have broken backs. The one Neon that has had this the longest has been this way for about 8 months. He has not died, nor does it seem to affect his swimming, and eating. Do I need to worry about this?