Opened the pool last week and discovered we have a leak. Losing about 1-2 inches per day. The pool was drained to just below the return all winter and didn't appear to be losing water so either it is a new leak that just appeared or the leak is higher than the return. No visible leaks on any of the equipment either. I found that the ground around a quarter to half of the pool is fairly wet and actually has standing water in one spot but I cannot see any water running down the outside of the pool. I also cannot see (from the outside) any tears in the liner. I've order one of those syringes with colored dye for finding pool leaks and it should arrive this week but I don't really know how to use it. any tips on how to find the leak? If I am able to find the leak any tips on how to repair it?
We moved here in 2013 and the liner was new in 2013 I believe. 24 foot round agp.
We are using a Hayward sand filter in case there is anything weird about those that could produce a leak that wasn't easily visible. (I couldn't figure out how to update my signature)