Signs Of Infection

Affective fish may scratch against hard objects however, awkward swimming with fins clamped and the appearance of a velvety grey film on the fish's body is a characteristic of the disease.

Fish Affected

Freshwater fish maintained below 77°F.

Details Of Infection

A microscopic organism that attaches itself to the host fish and destroys skin cells. The Costia cyst usually only attacks weakened fish but can be very prolific in over crowded tanks as the organism can only survive up to one hour without a host. However, some cysts can lie dormant for some time before releasing a fresh supply of parasites.

If infestation occurs, fish usually only survive for a few days.

Treatment

The cyst is less active at temperatures dies at temperatures above 77°F and will die if the temperature rises above 86°F for more than 5 hours therefore, heat is the simplest cure. Alternative treatments include a traditional strong (3%) salt dip combines with transfer of the fish to a healthy quarantine tank or a commercial anti-parasitic remedy applied to the main aquarium.