Popeyes , Exopthalmus One or both of the eyes protrude unnaturally from the head. The reasons for this clearly identifiable disease can be many. In most cases, the disease is due to deterioration in the water quality. Checking the pH, CH, CO2 content, ammonium, nitrite and nitrate is urgently recommended (JBL Online Laboratory). It has also been observed that vitamin deficiency can lead to protruding eyes. Please check whether the fish are getting a varied diet and whether open cans of food are used up within a maximum of 3 months. Hardly any vitamins remain in a can of food 3 months after being opened. Vitamin supplements should be added to the food with JBL Atvitol (aquarium) or JBL KoiVitol (pond).

If only one single fish is affected, it may be a bacterial infection. In this case, prompt treatment with JBL Furanol (in the aquarium) or JBL FuraPond (in the pond) is necessary to combat the disease and prevent it spreading further. Unfortunately it could also be an incurable fish tuberculosis.