1. The blackening of the goldfish tail may be caused by poor water quality. Generally, excessive chemicals in the water will lead to the blackening of the fish tail. If the situation is serious, it will lead to the phenomenon of failure.
2. Goldfish suffering from erector disease will also have a black tail, and their scales will even stand up.
3. When goldfish eat rotten or unclean food, it will cause intestinal inflammation and erosion, which will also lead to the blackening of the tail. In severe cases, the whole fish body will be blackened. If goldfish are found to have this phenomenon, they need to be isolated in time and treated separately.
goldfish tail blackening, first consider changing water. Note that the replacement of water needs to be insolated in advance, generally about three days to change the water, to ensure good water quality. Secondly, we should stop feeding temporarily and find out the cause of the disease. If more than one goldfish is mixed, it is necessary to separate the blackened goldfish from the normal goldfish in time.
If it is leprosy, it is necessary to wash the goldfish once a day with a proper amount of yellow powder for two weeks, and then put a small amount of salt, which can play a bactericidal and anti-inflammatory role. After that, we should pay attention to feeding problems and give goldfish more high-protein foods, such as earthworms, shrimps or special feed. If it is enteritis, it can be treated with gentamicin bath.
