Goldfish have red spots on their bodies.

You should try these methods, but you should be prepared. Treat dead fish as live fish, which is basically incurable.

first, stop eating for 4-5 days, and then add 8, units of 9×45×6 penicillin to the whole box, one in the morning and one in the afternoon, for 3 days in a row. Generally, it can be cured in 4 ~ 5 days, cured in the initial stage and controlled in the middle stage. It takes about 1 month for the rotten fin to grow well. Pull out the aquatic plants in the sick box, rinse them with clean water and disinfect them with methylene blue (dip the matchstick in the crystal change of methylene blue) for 15 ~ 3 minutes. Furacillin powder (1 ~ 5 ppm) is put into the sick fish box, which can be controlled in 3 days and cured in about 6 days. .5% ~ 1% salt can also be used in the early stage of the disease, which is also controlled.

second, stop eating for 4-5 days, reduce pollution, keep the water temperature constant, and it is better to reduce it by 2-3℃ lower than the original water temperature. In the absence of aquatic plants, drugs can be properly administered, and aquatic plants are sensitive to various drugs and die quickly. The commonly used recipes for tropical fish are as follows: Reference recipe 1: .5% ~ 1% salt can be put into the early stage, which can achieve certain results. Reference recipe 2: 1 ~ 5 ppm of furacilin powder can be sprinkled on the whole box in the early and middle stages. Dip a matchstick in methyl blue crystal powder and rinse it into the sick fish box to change color, all of which have good results. Reference Prescription 3: In the early and middle stages, put mercuric chloride into water and turn it into light red, which has a good effect of eliminating pathogens, but it cannot be used repeatedly. Because mercury is toxic, fish are not easy to excrete. Reference Prescription 4: In the middle and late stage, the specific medicine is mercurous nitrate, but fish are very sensitive to this medicine, which is easy to cause death, so it is generally not used. A 9×45×6 (cm) box can be filled with a piece of mung bean, and this medicine cannot be used repeatedly. The cure rate of this disease in Beijing Zoo is high, and the general loss is not great.

3. Stop eating for 4-5 days, and add 8, units of 9×45×6 penicillin to the whole box, one in the morning and one in the afternoon, for 3 consecutive days as a course of treatment. Generally, it can be cured in 4 ~ 5 days, cured in the initial stage and controlled in the middle stage. It takes about 1 month for the rotten fin to grow well. Pull out the aquatic plants in the sick box, rinse them with clean water and disinfect them with methylene blue (dip the matchstick in the crystal change of methylene blue) for 15 ~ 3 minutes. Furacillin powder (1 ~ 5 ppm) is put into the sick fish box, which can be controlled in 3 days and cured in about 6 days. .5% ~ 1% salt can also be used in the early stage of the disease, which is also controlled.