Where do you live? Is there a concern with the water table in your area? Given the drought conditions I'd doubt it but it's something to think about so your pool does not heave when empty. Mine sat empty for 3 months here in Az and not even a crack ... If your water is not real salty it may not be a problem on the grass. What kind of grass?


Sounds like the water has been in the pool for a long time.. A drain and refill never hurts in that situation.