Body Fungus (Saprolegnia)


  • Dirty cotton like growth on the skin
  • Can cover large areas of the fish
  • White fish eggs

Fungal attacks always follow some other health problem like parasitic attack, injury, or bacterial infection. The symptoms are a grey or whitish growth in and on the skin and/or fins of the fish. Eventually, if left untreated, these growths will become cottony looking. The fungus, if left untreated, will eventually eat away on the fish until it finally dies.


After ascertaining the initial cause of the fungus and remedying that, use a triple sulfur medication and repeat twice.  You should treat 3 times over 9 days every third day.

If the symptoms are severe the fish can be removed from the aquarium and swabbed with a cloth that has been treated with small amounts of povidone iodine or mercurochrome.

For attacks on fish eggs, most breeders will use a solution of methylene blue adding 3 to 5 mg/l as a preventative measure after the eggs are laid.


Leave a Reply

Your email address will not be published. Required fields are marked *