I found this site last year bought the Taylor TF100 test kit and have saved a ton of money from not being at the mercy of the pool store. Thank you to all the great experts who selflessly lend their expertise to us newbies. Now for my plea for help!
I have a 38 by 18 rectangular in ground pool with side stairs. I thought that I had a slow leak last summer as I found myself putting water in about every 5-7 days to maintain an acceptable level. I took the cover off the pool after being closed for the winter and found the pool lost all but 2-3 feet of water while I was closed. There is a clear water line that is about three to four inches above the current water level. It appears the pool drained fairly quickly to get down to the water line once it was closed. I walked all around the pool looking for a noticeable tear in the liner. After about three hours I gave up as I was unable to identify the leak.
How do I know if the leak is in the liner or in the underground plumbing? Is there a way to identify a leak in the liner with the water level this low in the pool? Should I drain the pool completely? Or, should drain the muck and refill with clear water to have a diver come and try to food coloring test? Any help would be much appreciated I am at a loss as to how to find and fix the leak.