Hi I have an inground vinyl liner pool installed in 2007. Live in Canada and very cold in winter. The pool base has developed 3 areas where the base has shifted over the winter, creating a "crack" where the base drops off about 1/2 to 1 inch. The liner is fine, and simply adjusts to the area where the base is now uneven.
Is this a problem that I should be concerned about? As I said the liner simply stretches a bit to accomodate the area.
The builder is no longer in the picture.
Any help or advice?