Causes and solutions for rot on the body of koi fish:

1. Acne disease

Rotten body of koi fish may be caused by pox disease. Some white spots will appear on the body of the koi carp at first. In the later stage, when the disease is severe, mucus will appear on the white spots and they will rot. In this case, it is necessary to change the water of the sick fish first to ensure that the water quality is clean and refreshing. Then use chloramphenicol and other drugs to treat the sick fish. If you persist for about a week, the rotten areas will improve. At this time, you can no longer use drugs. As long as you insist on changing the water and disinfecting regularly, the koi can recover.

2. Fungal skin disease

Koi fish may also suffer from fungal skin disease. In the early stage, they will grow a layer of white hairs. When it is severe in the later stage, the white hairs will appear. rot. At this time, the sick fish needs to be fished out and cleaned with salt water to wash off all the white hair on the body surface of the sick fish. After washing, apply 0.1% malachite green solution. Finally, soak in potassium permanganate solution for about 15 minutes.

3. Saprolegniasis

The rotten body of koi may also be caused by saprolegniasis. At this time, the water needs to be changed immediately to ensure clean water quality. Then use potassium permanganate solution to give the sick fish a medicated bath. The duration of the medicated bath should not be too long and should be controlled within 15 minutes.

4. Traumatic infection

The body ulcers of koi may also be due to the lack of timely treatment after trauma, resulting in inflammation and ulceration of the wound. Breeders need to use oxytetracycline or yellow powder for medicinal bath. If the ulcerated area is serious, the ulcerated meat needs to be cleaned before treatment.