"Matt Kruse" writes:

Dan Espen wrote:
You want it to run during the day, off at night.

Why?

I thought I'd like to swim during the day, with the pump off. Then at night
it can cycle through the filter and hopefully clean as much as possible so
in the morning the water is filtered.

Is there some advantage to running the pump during the day rather than at
night?

You can do whatever works for you.
Here are some reasons to run it during the day:

The pump runs water thru the skimmer removing leaves, etc. from the pool.
Unless you want to swim with that, run it during the day.

Most people want it quiet at night.