Hi, George,

Thank you. It is a 2 year old pool made from concrete block. I didn't have the skills to do plaster so I chose a liner. I also like the feel of a liner pool.

I see no reason why you couldn't to that to your pool. Yes, the waterline is halfway up the tile and yes, there is a horizontal track attached to the side of the pool and the liner has a bead that is inserted into that track. Beadlock is then used to wedge the bead tight in the track and waterproof it.

Send me a private message with your email on it, if you like, and I'll send you some photos that will help with the description. It's been a very interesting project.