I have a 20 year old in-ground vinyl liner that we plan on replacing next spring. I did a bucket test which confirmed that I have a leak. After a few days of monitoring the water loss has stopped. The level is above the returns and above the bottom of the skimmer opening. I had a leak in the wall professionally patched a few years ago and at the time the lines were pressure tested and found to be fine. I suspect that I have another hole in side of the liner, but no idea where. How do I figure it out? Most of what I have read has been dye tests focused on returns and skimmer leaks.