Hello Steve . . .
Recommended flow is 10K lpm (or 2641 gph). Anthony recommended a 1/8 hp pump (dialed back with a ball valve ) to achieve that. The final 'test' of whether the flow is proper is by measuring the depth of the water in the foam cup.
As for your question about pond size/stocking densities, I don't have anything in writing. I do know that in talking with Anthony at the ZNA SoCal show, he recommended the CL-10 for my size pond (6K gallons).