Well my Mogurnda Mogurnda has white on his eyeballs. I mean his eyeball is not cloudy it is on the surface of his eyeball. I have 4 catfish in the tank with him, so i assume it is a fungus. I thought it was strange as i have not put anything in the tank for atleast 6 months. So my plan of actions is melafix, i wanted to run it by you guys first. My only other question is after medicating can i use the filter on my main tank still or switch it to any other tank?