We just bought a pond liner and dug out a 6x4x2 foot hole. We added 2 steps at the shallow end. We stuck sand down in the bottom and then we laid the liner in and trimmed it. We stuck some pacer stones on too of the liner perimeter to hold it until we get some rocks. We had no time to fill on our own due to storms yesterday. The storm seemed to fill the deep end with no issues but up on the other end the liner is floating and the hole itself is full of water and along the walls. How do we stop this from happening?