Isolation: After fish scales are found on koi fish, it is necessary to transfer the sick fish to a separate fish tank to avoid infecting other fish.

Oxygenation: After being transferred to a new container, the breeder needs to use an oxygen pump to explode oxygen for koi fish to improve his metabolic capacity.

Keep the environment stable: We should also keep the living environment in koi fish stable, so as to speed up their recovery.

Medicinal bath: finally, koi fish is treated with potassium permanganate or oxytetracycline.