. One possibility is that the tail of the goldfish is torn by trauma. When the tail of the goldfish is scratched by a sharp object, it is easy to tear the tail. This situation only needs to maintain good water quality, appropriate water temperature, avoid goldfish infection due to trauma, normal feeding for about a month, goldfish can recover by themselves. In order to avoid this situation, it is better not to put some decorations in the fish tank that are easy to scratch the goldfish.
disease Fin rot disease is mostly caused by long-term water pollution or unreasonable water change. The fins of goldfish will be damaged, unable to stretch, and the fin spines will be exposed and split in turn, and the rotten fin disease is a serious fish disease that can cause the death of goldfish. For rotten fin disease, as long as the goldfish is changed in time and reasonably, and the water quality is not polluted for a long time, the disease can be well avoided. For the treatment of rotten fin disease, 0.01% potassium permanganate can be used to clean the affected area of goldfish, or 5pmm oxytetracycline solution can be used to bathe goldfish. In addition to medication, the sick fish should be carefully fed in suitable water temperature and water quality for about a month. In this process, more animal feed can be fed to make the tail fin and other soft tissues of goldfish grow well again.
