This poor little guy has been breeding (not on purposely by me) steady for the last few weeks with it's 3rd set turning to free swimmers on Thursday. Both parents doing well protecting their young in a community tank. But Thursday I found him nose buried into the corner of the tank. So I moved him to a 10 gallon isolation tank that. I noticed he was pretty beaten up. He's not eating, even bloodworms. Now Saturday he has this white dot. It does NOT look like ick, had that before. And all the other fish appear healthy. Ideas?