I know running the pump during the evening hours should save some $$$ on electrical, but are there any negative

drawbacks to the pool water sitting stagnant during the heat of the day?

I use to run mine from morning to early afternoon, but know

changed it to 7p.m. to 2:30 a.m.

I haven't seen anything negative yet, but it's only been a week.

Any experts, or novices have any thoughts on this subject?

Thank You