Fungus
Sympyoms: White growths on the body that are fluffy in appearance. These groths can also be found on the fin areas.
Treatment: Spot treat with gentian violet or methylene blue; use aquarium fungicide in extreme cases.
Gill Parasites (Flukes)
Symptoms: Labored respiration, scratching, glazed eyes, and loss of motor control.
Treatment: Sterazin.
The above is some of what I have in my book. I have no idea what sterazin, gentian violet, etc. is so you'll have to ask someone else. If you haven't already you should post this in the Tropical Fish Emergencies forum. you might get more help there.