How to delete pools

You can do that by clicking on it and choose delete on your keyboard. 
Or by using the sledge hammer from the top menu.

Edit: It's a sledge hammer not a bulldozer.... 😞

You can also click the pool wall to select it, just like a room and, sell it or, use the sledge hammer and sledge hammer all of the pool walls.

Ive been trying for an hour but I finally realized I have to go to the floor below the pool.

Hey @AgeOneFly great to hear that you got it figured out.

I'm going to lock this thread as it is quite old.

Darko