This question can be listed in many topics, but I figured I would post it here due to high traffic here.
Where did the pump run times come from? In the summer, I run my filter pump (and SWG) for 10 hrs and in the lower use winter time I back down to 8 hrs. I see some people even go down to 6 hrs.
Is there any science to this, or is it all just emprical data?