1. It's a week later and a couple of days ago I came across an enormous boulder that I had to dig out, leaving a 2 FOOT deep crater near one edge of my pool site. "Digging down" is really not practical, even if I did, I would surely just keep finding more of them. So I am thinking I should fill this with sand and tamp the **** out of it. Any other advice? Would paver base or crushed limestone be worth the trouble?

2. Suppose I finish this off eventually (maybe in 2016 at the rate I'm going) and after filling it and letting it sit for a while, it becomes 1" - 2" out of level. Is it practical to take out all the water and liner and re-level? Of course this would be a solid weekend worth of work, but I'm wondering if these pools are designed to be taken apart and put back together again.

Thanks all and always!