My liner developed a leak this year causing me to lose 15k of water over a 4 week period, and the pool companies are recommending I replace the liner, as the current one is too brittle. My first liner lasted 11 years and was 20mm thick. The new one is 28mm and lasted only 6 (too brittle as noted above).

Pool companies are telling me liner quality is much different now, and that thicker is better, but to only expect 7-9 years for a new liner.

Do different liners have different quality or are they all the save if they advertise "virgin" vinyl?

Joe