@DLane I second this option. This is the option my customers use. The one pool fill valve on an independent fixed schedule is a good choice.
@pwidsten Pool companies (licensed irrigators) in Texas can no longer connect an irrigation line that fills a pool. Although, I know some still do. You are grandfathered in. Just sharing the info.
TCEQ 344.62 (n)
(n) Water contained within the piping of an irrigation system is deemed to be non-potable. No drinking or domestic water usage, such as, but not limited to, filling swimming pools or decorative fountains, shall be connected to an irrigation system…