I have 2 discus which up until 3 days ago were quite healthy. Then the smallest started turning a dark color and then showed a white spot which turned into a white ring on RH eye. This then turned milky white over whole eye the next day. Then the LH eye did the same. Now the larger discus is showing the same symptoms. Can you tell me what might be wrong and can it be fixed?
Fungus attacked due to poor tank management and water quality.
Apply treatment Methylene Blue solution plus salt.
Or Ariflavine solution plus salt.
Water temperature remains 30 degree C.