Understood. Water here is expensive, since it includes a charge for sewerage. Total to fill the pool to a few inches below the returns is about $800 -- only to have to empty it again in the spring.
It sat empty with no problems for about 5 weeks while they worked on the renovations this fall with no problem. Also I did not see any water coming up out of the bottom drain. So I was looking for input on how real the risk of "floating" is. I'm not sure how to go about determining the water table level.