I took the cover off today to discover a massive 4’ rip in my liner. I have been repairing some rips in the past few years, so I kinda knew it was coming. The previous owner (who we bought the house from) thinks it only had a 7yr warranty on it, which was installed in ‘05. Are there any suggestions on what kind of liner to purchase for a 16x30 oval pool and DIY installation instructions?