1. Reason: The main reason of anchovies tail splitting and rotting is water quality. In the process of breeding, if you feed too much fish, the bait will settle on the bottom of the water if you can't eat it. If it goes on for a long time, it will cause water pollution.

2. Solution: In the process of feeding fish, we must feed 5-7 fish food every day, which can not only ensure that fish can eat enough, but also ensure that water quality is not polluted.

1. Reason: Filter filth can also cause fish tail to split and rot. If the filter is not cleaned for a long time, the harmful substances produced by the filter will accumulate all the time, and finally affect the anchovies.

2. Solution: Clean the filter in time. There is no time limit for cleaning the filter. If the filter becomes dirty, it should be cleaned to avoid harmful substances and harm the fish.

1. Reason: Temperature change will also lead to changes in fish's body. Fish is a temperature-changing animal, and its body temperature will change with the ambient temperature. If the water temperature is too high or too low, it will affect the normal growth of fish. The water temperature rises and falls, which will cause harm to the fish's body.

2. Solution: When breeding, control the change of water temperature and try not to change the temperature. When changing water for fish, we should pay attention to not changing water in large quantities, but leaving half for half, so that the water temperature changes little and the fish can grow normally. If it is completely changed, the water temperature changes too much, the fish will not adapt, and the body will be damaged, which will lead to the fish tail being split and rotten.