Hatchetfish with fungus
As with most health problems stress due to poor conditions is a major underlying cause for fungus. A small trauma to a fully healthy fish is likely to heal without any intervention but the same trauma on a fish under a chronic stress could is far more likely to result in a fungal infection. Large traumas on any fish could result in a fungal infection but what ever the initial cause it must be identified and removed or the treatment may fail.
Treatment There are several stages to successfully treating a fungal infection.
If the underlying cause is dealt with and treatment given in time (as early as possible) then the fish should make a full recovery.
As with most other fish ailments early intervention is essential. Very well established fungal infections are very difficult to treat and they will cause serious secondary problems making successful treatment less likely.
Saprolegnia is easily recognised by its cotton wool like appearance. Although it may appear to be a relatively harmless condition Saprolegnia can easily and quickly prove fatal if untreated. Unlike plants and animals fungi are not able to provide their own food, they feed on dead or living organic matter and they can't be eradicated completely because they are always present in the background.