Water was at level. Pool had some patches done before by American Leak company some years back. but after Pool vacuum put on the water level drop like 3/4 of an inch and has stopped there. Is it possible the vac took out some the vinyl patches made by pool vacuum below?. When pool was open 3 weeks ago it was not leaking. What else can it be and how to resolve this issue? The pool filter has some drops of water coming out every 2-3 mins like just a few drops. I believee this few drops would not have cause a 22,000 gal pool drop 3/4 of an inch? Am I correct.