I used road construction underlayment on my quarter acre pond and then covered it with limestone. It came in a roll that was twelve feet long and I had them cut it into five and seven foot lengths. I used the different lengths dependent on the slope of the bank. I have not had much trouble with the rocks sliding into the pond as my steepest incline is about 3:1. You will still get weeds that germinate on top of the fabric, but it does keep the rocks from sinking into the clay. I have seen the fabric slide in a few places but it still looks pretty good after seven years. The rocks have kept the shoreline intact as my pond is in an open and windy area. I do not have any aquatic vegetation (other than algae)
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I forgot to add that I used six inch landscaping staples to affix the fabric to the ground.
