I'm creating a small pond were a planter used to be. The pond will be in among large patio pavers. In a previous post members were very helpful in helping me with filtration and pump size but now I find myself faced with another delemia. How do I attach and hid the pond liner on the existing pavers? I thought about using interlocking blocks to big a small wall but I'm not sure how to attach it to the pavers so it doesn't accidently get moved. Or is that not even a concern? Any suggestions? Thanks so much.