Do the hydrostatic valves leak or deteriorate enough to leak in an 8 year old salt pool? I am losing about1" a day.skimmers are tested fixed. Plumbing was tested lights tested. I cant find any cracks.Might be a coincidence but I over filled my pool before vacation.over the top. Now I have a huge leak.I live on a hill so I cant see the water table as a problem.Pool leaks the same on or off.i would let it leak down to find it but I don't want a green pool. Any suggestions.