I discovered this crack just below the coping on my fiberglass pool that was installed in 2019. It's about the size of a nickel. I'm trying to figure out what would have caused this and is it serious. It's just under the coping so I don't think anything could have hit it to cause the damage. You can feel it when you rub your hand over it. The first photo is zoomed in but you can't really see it when your back from it a few feet. I've contacted the pool builder but haven't gotten past leaving messages with his secretary. Is this something to be worried about?
