The fish eye has white membrane, which shows that it has blindfolded disease. This disease is usually related to poor water quality. Long-term failure to change water leads to an increase in harmful substances, which affects the eyes of fish and leads to its illness. If you want treatment, you should first change the water properly, usually once every one to two days, and the amount of water changed is about one quarter. It is necessary to raise the temperature after changing water, but it is not good to raise it too high. After that, salt should be properly applied, and the salinity should be maintained between three and five thousandths.

1. Change water in time: Blindfold is usually caused by poor water quality, so if you want to treat it, you must change water first. Changing water is different in peacetime, so changing water should be frequent at this time, otherwise the purpose of improving water quality cannot be achieved. Usually, it should be changed about a quarter every day, and it should not be changed too quickly, so as to avoid the stress reaction of fish caused by water quality fluctuation.

2. Stable temperature: Besides changing water, we should also pay attention to stabilizing water temperature. Once the temperature fluctuates, it will have side effects on the rehabilitation of fish, and may even aggravate the disease. After the temperature is stable, it needs to be properly raised, which is 3-5 ℃ higher than the usual feeding temperature, so as to promote its metabolism.

3. Drug soaking: If the condition is serious, it needs to be treated with drug soaking. It can be mixed with 1% salt water and furazolidone, and the concentration of the latter is 5 mg per liter. It can also be soaked with penicillin, and 50,000-100,000 units need to be added to every 10 kg of water.