This might help too, not the writer of this information below.
Fungus
Symptom: The fish has patches of white or gray cottony, fuzzy puffs attached to its skin, fins or in wounds. The fish's eyes may also be cloudy or have a film over them. There may also be excessive mucus production on the fish's gills, or around the circumference of wounds. Fungus is usually a freshwater fish infection. In most cases , this is a secondary infection.
Treatment: If medicated quickly, fungus is usually easy to cure. There are several packaged medications for this. Most include such drugs as Acriflavine, Neutroflavine or copper sulfate. Follow all manufacturers instructions. Some fungus medications are applied directly on the patch of fungus with a cotton swab. If this is what the manufacturer recommends, net the fish and place it on a clean wet towel. Dip the cotton swab in the medication and then swab it on the fungus spot. Do NOT keep the fish out of the water for more than 1 minute. Quickly place the fish in a hospital tank that has already been set up. Since fungus is usually a secondary infection, treat the fish in the hospital tank for a bacterial infection with Nitrofuran (Furan) or Kanamycin Sulfate.