1. Reason: After the koi is infected with mycotic skin disease, the whole body will be ulcerated. Mycotic skin disease belongs to bacterial infection. After being infected with mildew, koi first appear white spots, and then begin to fester, which can lead to death.
2. Treatment method: Immediately fish the koi out of the previous fish tank, and then use fungicide to completely disinfect the fish tank to prevent the bacteria from spreading again. After the fish tank is sterilized, add sterilized pond water and fresh water. After that, the koi is soaked in the prepared mixed solution of copper sulfate and seawater, and then the koi is put into a fish tank for normal maintenance.
1. Reason: Koi is relatively delicate, and it is easy to have wounds after collision with hard objects. If there are germs in the water, it is easy to get infected and fester.
2. Treatment method: Take out the koi and put it into the water mixed with two-thirds of the old water and one-third of the new water, and then apply purple liquid medicine or fish disinfectant to the ulcerated part.
1. Reason: If the water for maintaining the koi is not clean, or the water quality is not up to the standard, the koi will also have body ulceration.
2. Treatment method: Add yellow powder or oxytetracycline to the water for sterilization, then disinfect the ulcerated place of the koi, and then carry out normal maintenance.
