I have 2 Pacu and they have this white coating over their eyes. The one pacu looks sick and his color is very pale. They other pacu has one eye that has this white coating over it and that pacu has pretty good color. What is this? Is this a bacterial infection or a parasite disease. They started with this last night and it really got bad today. I am starting with a water change and then I have to treat them with some medicine, but I need to know what this is so I can treat them. Please help, anybody.