Conrad Kleinholz has been the Aquaculture Program Leader at Langston University, Oklahoma for 20 years. A major research focus of the program is managing water quality in ornamental ponds. Bioreactor systems for use in ornamental ponds are designed and tested. The systems enhance the health and appearance of the fish and the ponds. His research findings are the source of this article. He and his son, Kurt, have produced show-quality koi on their farm in Stillwater, Oklahoma for 10 years. You can learn more about their farm at

The Big Fish Challenge: Transitioning from water gardens to koi ponds

By Conrad Kleinholz / September 1, 2013 / 0 Comments

The demand for goldfish has declined dramatically in recent years, while the koi market is growing more quickly than ever. Unfortunately, making the switch from goldfish to koi requires much more than just a bigger pond! In this data-rich article, Conrad Kleinholz offers the expertise you’ll need to prepare your pond for the big boys.

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