If you were alone in the pool, the gain is only for you.
If the water was dirty, you can expect monetary loss, and if you’re in the pool drowned, expect good health.
Good luck, enjoy!
A swimming pool, swimming bath, wading pool, or paddling pool is a container that is filled with water to enable swimming or other leisure activities. Pools can be sunk into the ground or built above ground (as a freestanding construction or as part of a building or other larger structure), and are also a standard feature aboard oceanliners and cruise ships. In-ground pools are most commonly constructed from materials such as concrete, natural stone, metal, plastic or fiberglass, and can be of a custom size and shape or built to a standardised size, the largest of which is the Olympic-size swimming pool.
a small and rather deep body of usually fresh water (2) : a quiet place in a stream (3) : a body of water forming above a dam