Ulcers are caused by bacteria, Aeromonas and Pseudomonas. Aeromonas have been documented in Japan since as early as 1981. There are other bacterias that contribute to the disease, but these two, are most common. Both are present in the pond all of the time and both are treated the same way.
This article was written some time ago by Donna Caruso and myself. Some of the informatin might be useful.
One of the most asked questions I hear as a koi dealer besides do you eat them is how do you ship a koi? If I can remember back properly to when I first began with koi, it was a fascinating, puzzling prospect to me as well. After all, koi need water and doesn't water play havoc with cardboard boxes?
Hello and welcome to one of the largest selections of Japan's most premier Koi. A visit through the many Koi for Sale pages is your own personal tour of Japan's finest Koi farms. And with USA Koi's vast experience in shipping throughout the U.S. and abroad all are only a simple click or phone call from your pond.
I also added a feature that gives information about the Koi Breeders that I buy my koi from and and also a new section about all of the Koi Varieties we have. These features are located to the left in the Koi Pond Resources navigation panel.
Would you like to receive email from USA Koi about new koi for sale? How about an email every time I put a new Koi for sale on the web site? Just go to the Newsletter Sign Up and add your name or if you are already signed up reenter your name to change your preferences to receive the New Koi Update Email.
For many of us, our ponds are beginning to warm (or will soon be). Water temperature, not the ambient air temperature, is the gauge for what to do and when to do it in regards to your pond. Water temperature should be checked at approximately 1 foot of depth. Avoid feeding your fish until the water temperature is consistently above 50 degrees Fahrenheit. This will also be the time to start adding spring maintenance bacteria and enzyme treatments.
After a 
