Thanks, BigDave. My Mom lives with us so I'm keeping an eye on her and the pool now.

At 3:00 yesterday the FC=15. At 10:00 the FC=8 (using the FAS test). It lost about 3/4-1" of water - lots of splashing...

Considering this is the last weekend before school starts, I wanted to hold off on shocking the pool to 30 so the kids can swim more. Do you think my pool will be OK if I maintain 15FC level over the weekend?