Sponge floor pool?

Question

what does it mean, that your pool has a sponge floor?

Answer 1

Obviously the floor of the pool isnt made of sponge, so I have no idea. Is that something that someone said, or what? Where did the question come from? If it is something somebody said to you, it's probably just meant in a discriptive sense. I did a search on google, nothing came up.

Answer 2

Did you just install the pool? If yes, the sand underneath the liner takes a few weeks to settle and it will feel soft and "spongy" until settled. There is nothing wrong.