When to Run Filter with SWC


LifeTime Supporter
Oct 29, 2007
Wit a salt water chlorinator is it better to run the filter during the day or at night? Or doesn't it make a difference? I am guessing that it may be better to run during the day so the new chlorine is being generated when the old chlorine is getting lower from the sun.

23K Vinyl Liner 18x37 free form
1.5 HP Northstar
Hayward 48 DE filter
Hayward Heat Pump 116K
SWC 40K gallon Leslie model


LifeTime Supporter
Platinum Supporter
TFP Expert
May 7, 2007
Silver Spring, MD
Welcome to TFP!

It is better to run the SWG during the day, but it isn't crucial. If you have time of day electric rates run the pump when electricity is cheaper. Otherwise run the pump during the day.