Al and Manslick thanks for the suggestions so far.

My pool is inground and does have a vinyl liner. The liner was just replaced two weeks ago by the company that put our pool in 10 years ago. We have been having some small leak problems that last few years such as a small tear in the liner and the leak behind the light in the conduit box. We thought we had them fixed...not so sure now but we have never had anything leak at this rate since the installation of this new liner and a new drain cover.

We lost about 3 more inches since 6pm yesterday (to this morning) I have been putting a piece of tape on the liner by the steps to gauge the leak but have not been timing it. I will do that starting now. Since it has continued to leak below the skimmers my guess is that it is not in the skimmers because we turned them off yesterday morning because the water had dropped below it and were sucking air yesterday am.

So since the leak continues below the skimmer would you still plug the skimmer and the return lines? I am guessing yes to at least rule that out?

Thanks again for the advice! When we were first putting in our pool I found this site and read up schematics and plumbing line sizes etc to talk to our pool company about. It was very helpful! But then I had a computer crash and got busy with life and didn't look for the site again until now. So nice to have experience of others to get advice as sometimes pool co keeps pointing us back in the same direction but without any resolution!

Angela