1. In the early stage of the illness, in addition to improving the water quality, add salt with a concentration of about 0.5% to the water, heat the water to above 30 degrees Celsius. There will be obvious improvement in 3 days. Gradually change the water, replace the water quality within 2 weeks, and then adjust the water quality and increase the nutrition.
2. When the illness is severe, medication treatment is necessary. Water-soluble antibiotics such as penicillin and other mycin antibiotics can be used. Put 10,000 to 20,000 units of antibiotics into each liter of water. At the same time, raise the water temperature by 2 to 3 degrees Celsius. You can also use a low-concentration potassium permanganate solution for spraying or soaking.
3. When it is so severe that the area around the eyes begins to rot, put 2 norfloxacin tablets into the fish tank every day. When adding the medicine, take out the activated carbon in the filter material. In the evening, apply 1 dissolved norfloxacin tablet on the fish's eyes in advance. After 30 seconds, put the fish back into the water. It can be cured in about ten-odd days.