Sand filter/pump question

[CarlD]

The object is to turn over the water at least once a day. That means running 10,000 gallons through your filter. It all depends on how many gallons a minute are being pumped through. But usually 8 hours / day seems to be enough.
Lots of people have different opinions on day vs night. Day, when people are using it, keeps it cleaner when they are using it. Running it at night distributes the chlorine better without UV breaking it down.

[mas985]

This Study, courtesy of Ben, suggests that only 3-4 hours per day is necessary for run time. Time of day didn't have much of an effect but a split run time helped some.

I actually did this last summer and averaged about 4 hours per day (2 hour high speed and 2 hours low speed). This turned out to be less than a 1/2 turnover per day and I didn't even notice a difference in water quality. I am not sure that every one can get away with such short run time but it is worth a try.

[CarlD]

Well, the shortest run you can saves electricity, though with a 2spd you can run at least 3x longer on low than high for less kwhs.

[Steve V]

Thanks for all the help. It is amazing that in 1 week my pool is clear and ready to swim, eventhough the air is not quite warm enough yet. I will let my FC come down to about 5 and run the pump once a day for 6-8 hrs instead of 24hrs non stop.