December 21, 2005

Koi doesn't look right

I just discovered a bump on my oldest (3 yrs) Koi! What could it be? I also noticed some of his color is turning a bright gold too. This fish is very fat. He is probably is as wide as he is long. My pond is 55 gal. Do you think he is too big for the pond? Thank you for always answering my queries


Although I have no way of knowing what that bump is on your koi, I can definitely say the pond is waaaay too small for the fish. When we get fish for a pond, especially koi with their voracious appetites, we can tend to over feed. In feeding normally in a large pond the fish would grow accordingly. But by feeding normally, the same amount as we would in a large pond because they are the same fish after all, the fish does not have the opportunity to grow, so it gets fat. Fat in fish is as unhealthy as it is in humans. It affects their internal organs, its immune system and the overall lifespan of the fish. Does the fish have a tumor? Possibly. It is also possible that the fish is egg bound. It can also be parasites under the skin. But 55 gallons is not a suitable pond for a 3 year old koi.

As for the color, it is not significant of any problems. It will continue to refine and develop as the fish matures. Koi can take up to 10 years to assume their true colors. The right food, good nutrition and good water quality will help the fish develop the best color. Summer sun is helpful also.

Happy Pondkeeping!

MacArthur Water Gardens

MacArthur Water Gardens
PO Box 3628
Alpharetta, GA 30023-3628

Posted by bfogle at December 21, 2005 02:24 PM