Sick Fish

My catfish has developed brown spots. Any ideas on what it could be, some type of fungus maybe? He is the only fish that is sick. He is swimming and eating fine but does show some signs of stress, mainly his fins are slighlty ragged on the ends. I Have checked water parameters, all are good. I am attempting to attach a pic.

Do you think he might have rubbed against something?
To heal the ragged fins (usually) you do more water changes and keep it really clean.

It could be a bacterial disease called Columnaris.

Thats a possibility. I have a lot of driftwood in my aquarium and my catfish dart back and forth through it a lot. Plus, they are scaleless which probably makes them more susceptible to scratches. I have already started additional water changes and vacumming.

Do you have any more info on Columnaris, John?

I read that sulfa drugs can cure it, but for now the partial water changes may work better without risking over medication or misdiagnosis. Miss Diagnosis, by the way, is the famous author of the Physician's Desk Reference.

Unless things have gotten really bad, the clean water will provide the environment needed for a recovery. Please keep us posted.

Thanks John, I did a little research myself and Columnaris is a possibility. I will know more today when I get home. I read it is a very fast progressing disease.