Solution: It is necessary to put the burnt fish in the fish tank alone and replace it with fresh water to avoid bacteria still in the water. You can cut off the burnt tail with scissors. The cut fish tail will grow out in a week.

Courtyard farming should adhere to prevention, timely diagnosis and symptomatic medication. Especially when winter goes and spring comes, it is easiest to lurk at this time, because there is no exercise for a long time in winter, the sunshine is insufficient, and the goldfish is weak. In the early spring of each year, we should often bask in the sun to enhance the physique of goldfish.

Disinfection of ornamental fish ponds and breeding tools. In combination with cleaning and changing water in the pond, spray concentrated chlorine solution on the wall and bottom of the pond, or take medicine bath in small water bodies such as 3%Nacl solution or 20mg/LKMnO4 solution, disinfect for 20-30 minutes, then rinse with clear water for standby, and regularly disinfect tools such as cages and net paper with disinfectant. Fish diseases are very popular in this season.

Extended data:

The water source for garden cultivation must be sufficient, the water quality must be good, and it is non-toxic and free of impurities. Tap water is best in the rural courtyard with tap water, which is convenient to take water and contains less bacteria, and is most suitable for breeding goldfish.

When building aquaculture ponds, it is necessary to install filtration and circulation system devices to promote ecological balance by releasing active bacteria, filtering solid substances floating in water and disinfecting lamps.

Before releasing fish, the pond must be cleaned with quicklime or bleaching powder to kill pests in the pond. Disinfect for about a week, and inject tap water or groundwater after contact.