We dug one a little deeper, cleaned it up (no sharp objects/protrusions), then layed down the liner in 3 sections, sealing with a 6" overlap.
Had previouslt trenched around edge, so liner is tucked in and held down.
Also, we installed gas vents, to prevent bloat up/float up!
Much bigger pond (1 acre) so may not be an issue in a smaller one.
