I have an inground with a hayward pump and sand filter and I use bleach. I currently run my pump during the day when the sun is bearing down on it. I'm wondering if I need to run the pump during the day or if I can just run it at night with no ill effects? Or is running it during the day the best for the water so that algae doesn't form? I may be able to get a discounted rate on electricity during the evening hours so that's why I want to see if I can switch to running it at night if it doesn't cause any harm to the water.

Also, I know this question has been asked a million times, but I couldn't find it when I did a search. How long should I be running the pump every day? Electricity rates keep rising so I don't want to run it more than I have to.

- Tom