I had a similar idea originally for a couple of ponds I built. The upper one has FHM, and the thought was some would go down the outlet ditch to the lower pond. The pond overflows regularly, as it is at the bottom of an irrigated field. The only time I get significant movement is in the spring of the year. I’m not sure why that is.

Brad
1.5 acre pond with LMB, BG, BCP, CC, FHM and lots of crayfish, unknown type. .5 acre pond with FHM and GSF. 12 acre irrigation reservoir that I don't know what to do with. New pond, roughly 1.5 acres. Pond Boss Subscriber.