1. Reason: The ulceration of koi is caused by the invasion of bacteria into the fish body, so this kind of bacteria is contagious. If not isolated in time, the bacteria in the water may infect other fish, especially those who are weak or have wounds on their bodies.
2. Treatment: Isolate the sick koi in time. Put the diseased fish into a new tank and fill the tank with tap water that has been dried for several days to prevent koi poisoning. At the same time, the water in the original tank should be changed in time, four times, one quarter each time. In this way, germs in the water can be prevented from infecting other healthy fish.
1. Reason: If the temperature is too low, it is easier to breed bacteria, and the constitution of sick fish is weak, which can easily lead to secondary infection.
2. treatment method: raise that temperature with a heating rod. It is better to choose a better quality heating rod and put it in the water, and use a thermometer at the same time. Heat slowly to ensure that the water temperature does not suddenly increase, so that the koi will not be able to adapt and appear abnormal.
1. Reason: Fish whose bodies have festered can not be completely cured only by changing water. If they are not treated effectively in time, they may die of infection.
2. Treatment method: First clean the fish body with potassium permanganate, and then add a proper amount of yellow powder in the water to kill the bacteria on the body and relieve the symptoms of ulceration.
