Yes, "ON" time is when the Pump, Filter and SWCG are all running (it is a package deal). I have it set up as you say in a binary system either everything is on or everything is off.

My thought is this, I'd like to run the system as few hours as necessary to reduce the electric bill. I traditionally ran the pump for 4-5 hours a day before I installed the SWCG.

I will see if I can find any stats on the Pump as far as gallons per minute or per hour when I get home to calculate a complete water turnover.

Thank you very much for your reply. BTDG