Hi Gene,

The last earthquake that shook water out of our pool cracked
the plaster lining. It was a hairline crack that
couldn't be seen. If your pool is an in-ground type with an
automatic water fill mech. you may not know you have a leak
until you've put LOTS of water in it. Turn that feature off
for awhile to make sure you aren't loosing water.

Just a thought. Hope your pool is just fine. Take care!

Katie