So last week charlie did something to his right eye, just as of today I've noticed a bubble/blister like thing on his left eye. What could this be?
I just cleaned his tank monday, did about 50%. I've been treating him with Maracyn, because he had a bad, sudden case of fin rot. I'm half way into treating him for a second week, I also thought it'd be a good med because I thought maybe, he had pop eye. Also, I put 1 tablespoon of ground up aquarium salt when I did the water change.
Tank temp is at 81 degrees.