Posted: 16/09/2013 at 11:38
never done this Mark so just some thoughts.
First that you'd need quite a large pool to capture reflections. that it needs to be rectangular with the long dimension running towards what you want to reflect. That it needs to be plain and unplanted. That you'd need more space to stand back from it to see the reflection.
There may also be light direction issues but that's physics. I remember sticking pins in a board in front of a mirror at school, this was to show something about refection. Hmmmmm.