teehjaeh57, thanks for the phone call again. I think I do have most/almost all of my leakage at the dam side. The rains we've had lately have exposed this. I think I'm ready to give this stuff a try even though I am a partial groundwater pond.
Great meeting you, Tim - and you're welcome! Happy I learned more about your pond and hope I can help down the road.
Many men go fishing all of their lives without knowing that it is not fish they are after. ~ Henry David Thoreau