1. Reason: Koi fish may swim up and down because they are frightened. As soon as they change to a new environment or are frightened, they will run back and forth. They are timid and sensitive to red, so they are easily frightened.
2. Treatment: After the koi is frightened, the breeder needs to keep the surrounding environment quiet immediately. If the frightened situation is serious, the fish tank can be covered with black cloth to let the koi recover by itself. During the recovery period, the feeding amount can be reduced. If they don't eat or eat less, they don't need to be fed.
1. Reason: It is also possible that the water temperature in the fish tank changes suddenly or the water quality is too poor. The koi can't stand the living environment, so they will swim back and forth.
2. Treatment: The breeder needs to ensure that the water is clean. It is better to change the water immediately and then open the filter. Also keep the water temperature between 20-25 ℃.
1. Reason: It may also be lack of oxygen. Koi carp has a high demand for oxygen. If they lack oxygen, they will have upstream and downstream conditions.
2. Treatment: The breeder needs to change the water in time and turn on the oxygen pump to increase the dissolved oxygen in the water. Koi needs a lot of oxygen, so it's better for the breeder to turn on the oxygen pump every day.
1, the reason: Koi upstream and downstream may also be sick, because they will be sick after discomfort, so this will happen.
2. Treatment: The breeder needs to isolate the sick fish, and then treat the sick fish according to the symptoms.
