Arowanas - Diseases and Cure Part 2

Cloudy eye

a. Wounded cornea infected by tubular bacteria
b. Bad water quality or nitrogen in the fish's body

Symptoms:

It usually happens to one of the eyes. At the beginning, the eye is mistily shaded. In later stages it's become blurred. In the end, the affected eye swells with white cotton-like cones growing outward. The Arowana can possibly die if no effective cure is applied.

Treatment:

When the eye is mistily shaded, change 1/3 of the water in the aquarium. Add some raw salt or sea-additive with a consistency of 5%. Keep the temperature at 30-33 degree C (86-91 degree F). Observe for two days, if it does not get worse, the only thing to do is to change 1/4 of the water every 3 days and adding raw salt until it heals. If there is worsening in condition, medication should be applied. Put in some soluble medication such as aureomycin, penicillin or other dedicated medication for fishes. Use the dedicated medication according to given instructions. When medications are in use, raise the temperature by 2-3 degree C and observe carefully.

It takes about 3-5 months for the Arowana to heal in the eyes. Gradually stop the usage of the medication if the eye does not swell anymore. The iris will look smaller after healing but functionally this is not a problem for the fish.