Brochis splendens with fungus

[notv19]

Can anyone please help me out?

I have a (tall) 20 gallon tank with one adult angelfish, 4 different corys... well one is an Emerald catfish.

All the catfish are about 4 years old, I got them all around the same time. They have always been very healthy and everything has been just fine with them.
Only yesterday I suddenly noticed that my Emerald's left eye looked dead, the other eye seems fine. It seems like he cannot see out of the dead looking eye at all. Now I noticed today that the dead eye seems to have growth on it, cottony looking fungus possibly... he terrible about me taking pictures, so I haven't even tried.

I would assume that I will have to put him in a hospital tank and treat him... my question is with what?

I know that catfish are very sensitive to medications and I've only ever had to treat two back years ago... at the time I only had PimaFix and MelaFix but I have a lot more in my medicine cabinet today. Mostly Mardel and Jungle brand products.

Does anyone know if Mardel's Maroxy or Jungle's Fungus Eliminator is safe to use for this fish?

If not, what else can I use to treat him... or could it even be bacterial and not fungus? I've never seen such a thing so I have no past experience with any eye problems like this.

edit: Here's a picture.
http://i3.photobucket.com/albums/y53/no ... erald1.jpg

[Freshman]

Hi,
It would help if you could provide us with more information on the tank setup and water parameters readings.

Anyway, I guess the injury might have been caused by the adult angelfish.

(Have seen angelfish disturbing small tetras and cories in LFS )