Ben Plonski, a real lover of koi, has been in the koi business for 43 years. He has been traveling to Japan for 25 years to handpick koi for sale in the U.S. market. He is a member of the Shinkokai All Japan Nishikigoi Promotion Association (U.S. District) and president and owner of Laguna Koi Ponds, Niji-Yama Wholesale Koi and Matala USA. For more information, visit

Language of Koi | Treating Koi Sleeping Disease

By Ben Plonski / December 27, 2018 / 4 Comments

Koi sleeping disease is an infrequently discussed viral disease in koi that has been around for many decades. Most koi health books written in Japan mention this disease, but it seems that many U.S. koi dealers have heard of it but do not really understand it. I would venture to say that most koi hobbyists […]

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Mixing Koi Populations, Part Two | Preventive Quarantine Protocol

By Ben Plonski / June 28, 2018 / 0 Comments

In the May/June 2018 issue, I wrote about how pond fish carry various good and bad “bugs” at all times. As I discussed, we cannot sterilize a fish or a pond to rid them of these bugs. Our efforts in pond health management should be focused on building the strength of the pond fish so […]

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Language of Koi | Preventive Treatment for Koi Health, Part One

By Ben Plonski / April 27, 2018 / 2 Comments

Most of us have witnessed this scenario. The pond is doing well, and the koi are really healthy. So, time for more koi, right? In go the new fish, and all is well for a week. But then, things turn ugly. Suddenly the koi look very sick, they don’t want to eat. If proper action […]

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