I am not a pool dealer, just a noob myself who is in research phase before I buy. I was told Lomar and GLI are great liner companies. If I were you I would NOT buy another liner from that same store. Go find the thickest liner you can buy online, I think at least 25 gauge, they may make thicker. You will have to spend a little extra for quality. I see some that carry a 15 yr. warranty. Good luck!! You sound like you have my luck, LOL!!