Not sure if this belongs in this bb, but here goes.
I have an in-ground pool. Over the past four days, the lining has started to sag. The pool does nto appear to be loosing water. But the lining is no longer flat up against the sides or bottom, there are "bubbles" forming in th eliner - large sections of it pulling away from the walls. Also, there appears to be water in-between the liner and pool walls.
Is this indicative of a hol ein the liner somewhere? How do you find such a thing?