White spots in koi fish are white spots, and water mold is also called white spots. The pathogens are mainly water mold and mold, which are parasitic on fish wounds and eggs and are common fish diseases. The treatment method is as follows:

1. Wash with 1.5%-2.5% salt solution;

2. Hair removal, and then 2% mercuric chloride coating;

Third, bathe the sick fish with oxytetracycline;

4. Apply malachite green aqueous solution with the concentration of 0. 1%- 1% to the wound and the water model attachment;

5. Soak the fish in malachite green water solution with the ratio of 1: 15000 for 3-5 minutes;

6. Soak the fish in 10mg/kg potassium permanganate aqueous solution for half an hour.

disease control

1. oral method: drugs are mixed in the feed to treat malnutrition or bacterial diseases and internal medicine diseases.

2. Medicated bath method: it is mainly to drive away parasites on the body surface and treat bacterial exogenous diseases.

3. Local treatment: treatment of trauma and body surface diseases, and treatment of local trauma.

4. Injection therapy: various bacterial diseases can be injected into muscles or abdominal cavity.

5. Surgical treatment: plastic surgery for injured or deformed fins.

Koi fish belongs to CYPRINIDAE in biology, with more than 3,700 species in the world. It is a kind of advanced ornamental fish popular in the world today. It has the reputation of "living gem in water" and "swimming art".