Mouth fungus is most commonly associated with the head, though not exclusively the mouth. It may affect the face and gills as well as the jaws. Less frequently, it can also affect the body and fins, and as such may be easily confused with finrot. Nonetheless, the short tufts that are typical of mouth fungus infections are distinctive.
Redness or soreness.
Cotton-like feeling in the mouth.
Loss of taste.
Pain while eating or swallowing.
Cracking and redness at the corners of the mouth.
Use anti mouth fungus medicines according to the tank size (Dosage 10 ml per 100 liters)
Disease causing bacteria and fungus are present in every aquarium environment (although specific species may be introduced with new fish) but will rarely cause a problem with good water quality and happy healthy fish. Avoiding stress and keeping good water quality in the tank is key to avoiding and treating fish infections.