Sounds about right--might go ahead and bump it up to the whole 15 ppm--won't hurt! If your pool stays covered, it will slow the chlorine loss. I think I would take advantage of those sneaky in-laws, and leave a jug of bleach out for them to pour into the pool when they're finished swimming!
The absolute worst thing that would happen would be for the Cl to get too low and you have cloudy water when you come back, but that's dealt with easily enough.
Janet
Bookmarks