I just had an in ground pool installed, before it could even be used it began to lose water. This was due to a crack in the skimmer. The installers say they, of course are not liable for this because the ground settled and caused the crack. This happened the day we filled the pool. Anyway, their solution was to cover the entire inside of the skimmer with plumbers glue. This did not work it's still leaking. How can I remove this glue? Should I use an epoxy. This is my first pool and it's been an expensive nightmare. I'm 70,000 in and still don't have a pool that will hold water. HELP.