Rob you can search on ponds above and get quite a few posts.
There are a number of great landscaping pros here that have done this.
Why do you want to use fake stone, when you can achieve a beautiful look using real stone? Or are you looking for a more "modern" looking feature?
-a gunite pool uses this ideal wire fram blown in cement like material or stamped cement they have dye for colors
I think I'll stick with real stone.