We are considering laying this river rock-like tile down on our entire Baja shelf (8x18, 18" deep) I have searched and searched but can't find any photos or examples where others have done this. We have never had a pool before so we don't know if there is an obvious reason not to use this kind of tile. I realize it is on mesh instead of paper, but I think there should be plenty of grout to keep the rocks from popping out. Am I missing something? TIA!