I know this sounds like total weirdness BUT. Can saltwater make a liner photo sensitive? We had another good gully washin storm last night with a good amount of lightning and I woke up to a almost perfect impression of my pool ladder on the opposite side op the pool In the liner along with other randon spots. It looks like a shadow that you would see from the pics of nuke expolsions where it left a shadow. It's the weirdest thing. Also: had alot of brownish colored dusty stuff in the bottom as well.
Anybody ever seen anything lik this?