I have to admit this did not work as well as I had hoped. But I'm sharing my triumphs as well as my failures so that others can also learn from what I'm doing.
It will be interesting to see how well this spin filter works when I add the fish. While it's not exactly as I had hoped I believe it will make a significant difference.
As the fish grew and the demand increased it became apparent that this was only marginally useful as a settling tank. Maybe a better design would be more effective.
Below are links to two short videos that show the currents and settling of Koi food
Test with floating Koi food
Test with sinking Koi Food