Eastland said:
If you can, set where the water line will be, then quickly drop to 2' deep, then build another ledge that drops to 4'. That will prevent birds from wading the area, and weeds are a lot less likely to grow...
I agree. My new pond is bowl shaped with no drop off from the banks and I have discovered that it creates a problem with both weeds and wading birds. I am hoping to expand the size of my pond next year and will do it exactly as Eastland recommends.