Had a vinyl pool built this spring. The sides are concrete, the bottom is sand. The builders were, overall, not so reliable. We finally got the chance to use it today for the first time, and my 10 year old niece spent about an hour frolicking in it. The floor has a lot of give under it.
Turned the lights on tonight and the floor looks like a moonscape. Not just a little dent here or there, but dozens and dozens of dents and footprints. This is my first pool, but I've never seen this before.
Does this look at all normal?