You think the shallow well pump would work? My concern with that would be that IF I am at the water table, a shallow well pump would draw down my pond as it pumps water back in, almost recirculating it. Or am I thinking crazy?

Surface area is about 1.5 acres when at full pool. Would a coat of bentonite on the bottom help with ground seepage, or would it just get it pushed out once the water table rises again?