I'm putting this out again to ask if anyone may know the reason or is it something that will go away and not be concerned about. My new 15x30 oval steel pool with 1 inch Extruded Foam bottom has two or three loose spots on the bottom of the pool where you can move the liner with your feet and wrinkles develope. The rest is firm and does not move. Im not losing any water. The pool is set recessed in the ground on one side 22 inches to ground level on the other end due to the way the property runs. I back filled the trench around it. Is this condensation between the liner and foam bottom? ground water rising up in between the foam bottom panels? Just a stretched liner after set and use? Will it go away and should i just deal with the loose spots?