We built our pool in 2000. The 6th season our liner was split sideways when we opened the pool about 18". Not covered under warranty because it wasn't in a seam. So we replaced the liner. This year when opened we has a split in the same spot and it has grown to about 18". I called the manufacturer. They had us send photos. Said it appeared to be a problem with the fit based on the floor seams. The seam is 5" out from the wall on the side the split is on. The AB measurement was good, but the depth is a little off in the shallow end where the tear is. Unfortunately...the pool builder informed me that he had retired and had closed his business and sold his assets. I guess we will be replacing the liner again, but don't want to have this happen again. I thought we would get at least 10 years out of a liner. Any suggestions?