Cloudy Eyes
This can be caused by:
Eye-injury as a result of bad handling
Contaminated water
Symptoms
Initially, one eye may appear cloudy. It then becomes moldy as though a membrane is hanging over it. Eventually, the eyes may swell and are covered with blueish white foreign matter. At this stage, if they are not treated may result in death or blindness.
Cure
At the initial stage 1/3 of water should be changed and coarse salt should be added.
Water temperature should also be increased to 30°C to 33°C. Observe for 2 days. If condition improves, water should be changed every third day (1/4 of water) and more salt may be added until complete recovery. At the intermediate stage, medications may be needed to bathe the fish in. Such medications will have their own instructions to be adhere to on application. When eyes become moldy, recovery may take 3 to 5 months. If swelling subsides, medication may be reduced or stopped eventually. After recovery, eyes may appear smaller but that should be normal.