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Thread: BBB In the winter (Texas)

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    BBB In the winter (Texas)

    OK.. probably 3-4 months of swim season left, but I'm wondering...

    I think my pool manufacturer said that algae won't grow once water is below 57 degrees. As the water temperature drops, should I reduce my target FC levels based on the water temperature? I don't generally close the pool or anything like that.. the pump runs year round and I monitor water balance in the winter (and I've even had crazy kids jumping in the water to swim in January!).
    ----------------------
    20,500 gal gunite pool w/ PebbleTec and infloor cleaning system.
    Sta-Rite System 3 cartridge filter.
    Houston, TX

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    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,085

    Re: BBB In the winter (Texas)

    I would not reduce the target FC. Algae may grow more slowly, but chlorine will kill more slowly as well (essentially, all chemical reactions slow down at cooler temps). You should find that the rate of chlorine loss drops dramatically. In my own pool, it drops from around 1 ppm FC per day to less than 1 ppm FC per week.

    Poconos (Al) at The PoolForum in this post noted algae growth at 40F (and in some post I can't find he even found it under ice) so it is not true that algae won't grow in colder water. It can, but it does so much more slowly and it's less likely.

    Richard
    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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    Join Date
    Apr 2007
    Location
    Arizona
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    924

    Re: BBB In the winter (Texas)

    That is a really good question. I have a personal observation that I experienced this past winter. In Arizona, we don't winterize our pools. This winter, while I was recuperating from an illness and surgery, I couldn't get out to take proper care of my pool. Over 4 weeks of temperatures fluctuating greatly, I watched, through the window, my pool turn from blue to green to blue to green as the temperature changed. I had no idea it would do that, on it's own. When the temp got really cold, the pool turned blue, when it warmed up it turned green.
    Buggs

    14,000 gallon, in ground, plaster, free form, play pool.
    Sta-Rite Max-E-Glass with a 1.5 hp Emerson motor
    WaterCo Micron High Rate sand filter S750 490 lb, 4883 sq ft - using ZeoBest
    In floor Polaris cleaning system
    Blue Diamond robot for those after storm days when I can't wait overnight for the in floor to clean it.

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
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    37,887

    Re: BBB In the winter (Texas)

    In cold water, getting algae is much less common and any algae you do get will grow very slowly. The amount of chlorine you need to use will be much lower when the water is cold and you can reduce the pump run time as well.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Join Date
    Apr 2008
    Location
    Central Texas
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    326

    Re: BBB In the winter (Texas)

    In the summer, it takes about 3 quarts per day to maintain my chlorine level. Last winter it dropped to around 3 quarts per WEEK when the water cooled down and the sun wasn't pounding down as long (or as strong).
    26,000 Gallon Gunnite IGP
    2 HP Challenger High Head Pump
    60sf Nautilus DE filter
    Polaris 280

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    Re: BBB In the winter (Texas)

    That's encouraging to hear about the drop in usage.. any chance to save some money is good!
    ----------------------
    20,500 gal gunite pool w/ PebbleTec and infloor cleaning system.
    Sta-Rite System 3 cartridge filter.
    Houston, TX

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