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Thread: Running the pump overnight?

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    Running the pump overnight?

    I'm thinking of joining a program with my electric company that gives you cheaper rates for using electricity during "off peak" hours (I.E not during the sweltering hot hours when everyone has their air conditioning on). I've always run my filter during daytime hours when we are more likely to be in the pool which leads me to a few questions. Is there any reason that I should not run my pump overnight instead of during the day? I know you should run the filter for a while after adding chemicals, and it would actually probably work out nicer if I did that before bed. The only other reason I can think of to run it during the day is because my pool is hard to keep warm. Would it warm up better with the water circulating during the few hours that the sun isn't behind trees? Also, is there any reason I should have the pump on while people are in the pool?

    on a separate subject...how long should I run my pump each day?
    30 foot round AGP (25k gal), 2.5 hp pump, Hayward cartridge filter, Diver Dan pool vac, TF-100 Test kit
    -It takes less time to do things right then it does to do it again.

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    Mod Squad Bama Rambler's Avatar
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    Re: Running the pump overnight?

    There's really no reason you can't run the pump during the off peak hours. You may need to run the pump a bit during the day but you can minimize that.

    Most people ffind it adequate to run the pump 6 to 8 hours a day but you'll have to figure out how long you should run your pump for your particular pools needs.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Running the pump overnight?

    How do I know if I'm not running it enough? I think I usually do around 6 hours a day, but I'm not sure of what signs to look for that it should be run longer.
    30 foot round AGP (25k gal), 2.5 hp pump, Hayward cartridge filter, Diver Dan pool vac, TF-100 Test kit
    -It takes less time to do things right then it does to do it again.

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    Mod Squad Bama Rambler's Avatar
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    Re: Running the pump overnight?

    If your water stays sparkling then you're running it enough.
    When you look at it and say to yourself, Wow that's some sparkly water, you're running it enough.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Running the pump overnight?

    I have the "time of day" meter that you're talking about and running it at night is fine for me, although I do add some daytime hours during the afternoon when it's hottest. If your numbers stay in line, then running it at night shouldn't hurt.

    As far as pump run time, every pool is different. if your water is sparkling now, try cutting back an hour at a time (one change per week or so). At some point the water will begin to look a little more cloudy. When that happens, just add the one hour back and you should be good. Note - as seasons change your run time may also need to change, so if your pool starts to look cloudy as the weather heats up, add another hour.

    Good luck!
    45,180 gallon 26' x 53' IG Vinyl, irregular shape. Hayward sand filter / pump. Polaris AutoClear SWG, supplemented with a Hayward Automatic Chlorinator (In-Line). Hayward 400K BTU heater. Paramount "turnover" system. Polaris 480 PRO cleaner.

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    Re: Running the pump overnight?

    An hour to "stir" the pool during the day is probably a good idea. If you do get some algae or something started in the pool, if the water isn't moving you can get an FC-free dead zone, and circulating a bit will take care of that. Also circulating some during the day could have some effect on warming the pool. A solar cover would help with that as well (slows down the cooling more than actually warming, but every little bit helps).
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

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    Mod Squad JohnT's Avatar
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    Re: Running the pump overnight?

    I believe you should run the pump when people are swimming. Especially kids. Running the pump helps keep whatever might be brought into or left in the pool by the bathers to mix with the chlorine more rapidly.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    frustratedpoolmom's Avatar
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    Re: Running the pump overnight?

    Plus swimmers keep stuff stirred up so the filter can catch it....
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
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    Re: Running the pump overnight?

    Quote Originally Posted by JohnT
    I believe you should run the pump when people are swimming.
    Unless it's an Intex. Those specifically should not be run while people are in the pool. Otherwise, yeah.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

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    Re: Running the pump overnight?

    You may find that running the pump at night has the pool cool off more at night due to increased surface circulation so your average pool water temp may become lower.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Re: Running the pump overnight?

    Quote Originally Posted by chem geek
    You may find that running the pump at night has the pool cool off more at night due to increased surface circulation so your average pool water temp may become lower.
    I usually have a heater going because my pool doesn't get much sun (wife wont let me cut down any trees). I'll have to keep a close eye on my gas bill!
    30 foot round AGP (25k gal), 2.5 hp pump, Hayward cartridge filter, Diver Dan pool vac, TF-100 Test kit
    -It takes less time to do things right then it does to do it again.

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