Empire Gudgeon with infected mouth

[Rainbow_fish]

My empire gudgeon has like a fungus or infected mouth. It can still eat but it doesnt look good. Wat is it and how can i fix it??

john

 

[WILDER]

Mouth fungus which is columnaris here is a link for you.

 

[WILDER]

http/www.flippersandfins.net/flexibacter.htm