On Sun, 14 Aug 2011 09:04:01 -0700 (PDT), DD_BobK wrote:

Occasional high wind / hot weather usage as high as 1" per day.
Suggestion: Cover pool to reduce water loss & improve "swimability".

This meshes with what I'm seeing.

For me, 1 inch is 500 gallons of pool and I lose about an inch every few
days.

I think a pool cover is in order!