I noticed yesterday that the pool wall beneath my fiberglass steps http://www.alpsmfg.com/product/10-st...man-back-step/ is bowed in the middle underneath the steps. There is a gap behind the liner at the junction of the pool floor and the wall.
Here is a photo looking down:
Here a photos from the side:
The curve is symetrical with the apex of the curve in the middle.
I'm sure it did not exist when I opened the pool. The pool is 2 years old.
Any idea what is going on?