I have a female guppy who has what I believe to be either cottonmouth/body fungus or some kind of tumor growing alongside the mouth. I have tried taking a few pictures and 2 movies to show it as best I can, but it doesn't come out very clearly. It looks like a white cottony area. I have isolated the fish in a quarantine tank and initially used the appropriate dose of Fungus CLear, but I then did a 1/3 water change and have switched to erythromycin treatment and have been following the directions including the directed water changes. I'm on dose 3 of 4 and it doesn't appear to be changing at all. The fish was in my large tank for approximately 1 week before I moved it; my understanding of cotton mouth is that its highly contageous, which leads me to think it might not be it since none of the other fish in that tank are showing any signs whatsoever. Whatever it is that is affecting this fish has disfigured it's mouth, though it is still able to eat. Has anyone encountered this before, or have any ideas on what I might try?
The movies are in .mov format and the 2nd one I would say is the best one, but the file sizes are a bit large if you're on dial up. But I really appreciate all help and suggestions!
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Movie 1
Movie 2