...Plugged my 36" prospector into a near still pond, flow and speed didn't start until water hit the plate and worked great all day this way..
If low flow is an issue the 36" sniper might be the best bet... Can easily run the the same amount of material in a day not classifying with my super mini as I was when classifying with the A52..
I think that this'll work. There's no current to force water through the tubes, but there is almost a 1' drop from the pond surface to the lower end of the sluice, and so 1' water column to provide pressure.