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Understanding Koi Disease

October 7, 2008 by admin 

Koi Disease

Your Koi pond should always be kept clean and pristine to avoid any kind of Koi disease. However, sometimes even the most careful attention can’t prevent the Koi from getting sick so you must watch your fish carefully for signs of illness. Here are some common diseases that should be prevented.

White spots are caused by Ichthyopthirius multifiliis. White spots seen in koi are individual protozoans. They go under the skin and eat the tissues. Eventually they will drop off and fall to the bottom of the pond where there reproductive cycle begins and new “Ichs’s” are made which go about infecting your other fish.

Watch out for a thick slime on the skin of your fish – this can indicate parasites or disease.

Anchor worms are Crustacean parasite. They settle in the koi’s gills while they are young. They mate as they mature. The female anchor worm buries itself in the koi’s cell tissue.

Finrot and ulcers are Koi disease caused by bacteria. Ulcers are cause by internal injury. The bacteria will make the matter worse by causing further damage to your kois scales and fins.

Fish lice are parasites that have a sucker with which they stick themselves to the koi and inject toxins. This can be very irritating to the koi and you might see them rubbing themselves against rocks to relieve the irritation. Severe infection from these parasites can cause serious damage and can eventually lead to death.

Skin and gill flukes are like fleas in fishes. They’re found in koi’s body and also cause irritation.

Cotton wool disease is caused by bacteria. It forms a white threadlike matter that develops around the mouth of the fish and spreads into the body. This often leads to ulcers.

If you find any of your fish infected with any type of koi disease, you need to isolate them to prevent them infecting your other fish. Put them in a large fish tank and administer whatever treatment is necessary. Keep them isolated for at least 2 weeks or longer if you think the disease is still present. This is critical in keeping the rest of your koi healthy, eliminating the chance of spreading disease.

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