Signs Of Infection

A white film covers the body, mainly on the head but also on the fins and gills. The body of the fish becomes ulcerated and the fins frayed. In the latter stages of infection parts of the lips and head may become eaten away.

Fish Affected

Columnaris affects many tropical fish primarily Live-bearers.

Details Of Infection

Columnaris or cotton wool disease, is caused by the bacteria Flexibactor columnaris. It is highly contagious and can spread rapidly via contaminated nets and other aquarium equipment. The bacteria can can enter the fish through any small grazes or wounds where upon the signs of infection detailed above develop.

Treatment

Treatment must be administered quickly as fish usually die within 24 hours. Some anti-bacterial medications can be effective and again the addition of salt to the water may be beneficial. Aquarium equipment should be disinfected using the same medication. The best cure is prevention - maintain a clean environment for your fish.