with the blackening of the fish body? If the blackening of the fish body, you need to change the water properly first, then raise the water temperature, and add oxygen to the water. If there is no recovery after a period of time, it is not stress, and it is very difficult to solve it. If it is caused by disease, it may usually be a parasitic infection, which needs to be disinfected. If it is caused by malnutrition, it is necessary to feed some better feed at ordinary times.
for the blackening of fish body? 1. Low temperature: There are many reasons for the blackening of fish body, among which the temperature change is more obvious. Fish are poikilotherms, and their ability to adapt to water temperature is very limited. If the temperature suddenly drops, the fish will feel uncomfortable. Therefore, in the process of feeding, it is better to control the water temperature with a heating rod.
2. Lack of oxygen: When a fish lacks oxygen, it will also produce some stress reactions, and its body color will turn black. In addition to blackening, fish often come to the surface to breathe, which is commonly known as floating head. In view of this phenomenon, it is better to pay attention to oxygen in peacetime and keep the dissolved oxygen in water adequate.
3. Malnutrition: If there is no nutrition in the feed that the fish eats for a long time, it will also lead to blackening of the body. At this time, it is necessary to change some good feed for it, preferably with a certain pigment, which can also add color to the fish.
