How long to run pool pump in the winter?

kal2002

LifeTime Supporter
Jul 4, 2010
235
northern California
Hi everyone. This is the first winter that we have to maintain the pool ourselves. I am practicing BBB so the pool water is very clear. I keep the FC level at a minimum of 7. In the summer, we run the pool pump for 7 hours daily. Last winter, we reduced its run time to 5 hours daily as we were instructed to do so. Is that too long or not long enough to keep the pool clear in the winter? The water temperature as of yesterday was 64 degrees. Thanks for your help.
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
20,403
San Dimas, CA (LA County)
Mine survives fine on 3 hours in the winter. I calculated once that I get a full turnover in about 4, but no one's swimming in it, I don't get a lot of debris, and like you, the water's cold.
 

mas985

TFP Expert
LifeTime Supporter
May 3, 2007
12,379
Pleasanton, CA
chem geek said:
I cut back to about half a turnover per day when the water gets colder (< 60ºF).
That's what I do as well. When it gets below about 50, the SWG shuts off so sometimes I'll go down to a 1/4 turn or even shut off the pump for a few days until it warms up some. I also tend to let the FC drop with the run time so even with a CYA of 80 ppm, a FC of 1-2 ppm seems to be enough with the water that cold. It seems that algae doesn't grow or at least grows very slowly below 60 degrees.
 

kal2002

LifeTime Supporter
Jul 4, 2010
235
northern California
mas985 said:
I also tend to let the FC drop with the run time so even with a CYA of 80 ppm, a FC of 1-2 ppm seems to be enough with the water that cold. It seems that algae doesn't grow or at least grows very slowly below 60 degrees.
Wow, with your CYA at 80, you only have to maintain FC at 1-2 ppm? Maybe I can lower mine to less than 7 when the water gets below 60 degrees. I am afraid to keep the FC at lower than the minimum Mustard Algae level since I don't want to get Mustard Algae again. Maybe I should start testing FC daily again to get an idea how much bleach the pool uses in the winter.

If I did my math right, each turnover takes about 3 hours. Based on your opinion, I can turn it down to 3 hours or less when the water is less than 60 degrees. That is good news. Saves unnecessary energy.
 

mas985

TFP Expert
LifeTime Supporter
May 3, 2007
12,379
Pleasanton, CA
I have never had algae let alone mustard algae so you may need to keep your FC higher then me but one thing to be aware of is that chlorine extinction due to both UV and water temps tends to decrease quite a bit during the winter so you don'r need to add as much chlorine to get to the same residual as the summer.
 

kal2002

LifeTime Supporter
Jul 4, 2010
235
northern California
I have another question. I found out this morning that he pool filter was gushing out water from both side so I turned it off. I made an appointment for a pool repair service for next Monday because it is going to rain starting tomorrow until Sunday. Is it ok to leave the pump off until Monday? When I tested FC this morning, it was at 9ppm. I will try to maintain the FC at a minimum of 7 although I don't know if it is possible since it is going to rain. Thanks.
 

zea3

Mod Squad
TFP Expert
LifeTime Supporter
Jul 10, 2009
10,966
Houston, Texas
I just ended 4 weeks without a pump. You can add your chlorine manually by pouring it around the perimeter of the pool and then mix it in by brushing the walls and floor. It takes a little time and muscle but it will prevent the pool from going green.
 

Beez

LifeTime Supporter
May 19, 2009
785
Dallas, TX
Shoot, I ran my pump once a week last winter! I took a cue from those who close their pools. Consider this: A closed pool gets no circulation at all and it turns out fine in the spring. :sleep:
 

bk406

Well-known member
Dec 3, 2009
2,690
Central Massachusetts
Beez said:
Consider this: A closed pool gets no circulation at all and it turns out fine in the spring. :sleep:
Yep. I close mine down when the water hits the mid to upper 50's. The pump doesnt run for nearly 6 months and when I open in mid April, the water is still clear as crystal.
 

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