Well, I have an answer for that. Several, actually:
- The blocks and bricks are all mis-matched and the result would have been even more of an eyesore than the current rigid pond liner
- I would have had to move all of the blocks myself (the bricks, I could handle)
- There are a few small pieces of the liner missing. I used them to line my mini-water gardens.
- I didn't think about it until after I had purchased the rigid liner.