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Thread: Low CH

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    Join Date
    Feb 2012
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    Low CH

    Is it common to have low CH constantly? I seem to have a lot of trouble maintaining CH. This year I started out with around 90 but I'm pretty sure we closed around 200. Seems like every year I have to add a butt load of CH at the beginning of the year. My pool is not covered over the winter and I do a few backwash during the winter due to rain water but didn't think I've drained over 50% of my water during the winter.
    11,000 gal Fiberglass IG, Jacuzzi sand filter, Pentair Superflo 1.5hp 2speed pump, Hayward AQR15, Maytronics Active20, K-2006 kit, K1766, SpeedStir

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    Mod Squad jblizzle's Avatar
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    Re: Low CH

    CH will not drop unless you are replacing water with some that has a lower CH content (like rain/snow or tap water).
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: Low CH

    well I guess I'm actually turning over more than 50% of the water over the winter.. would algae eat up CH as well?
    11,000 gal Fiberglass IG, Jacuzzi sand filter, Pentair Superflo 1.5hp 2speed pump, Hayward AQR15, Maytronics Active20, K-2006 kit, K1766, SpeedStir

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    JasonLion's Avatar
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    Re: Low CH

    No, nothing uses up calcium except water replacement and scaling.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Mod Squad jblizzle's Avatar
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    Re: Low CH

    No algae will not eat CH ...

    Quote Originally Posted by jblizzle View Post
    CH will not drop unless you are replacing water with some that has a lower CH content (like rain/snow or tap water).
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Mod Squad YippeeSkippy's Avatar
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    Re: Low CH

    Are you sure that your fiberglass pool even needs Ca+ ? I don't even worry too much about that anymore. There is some question as to whether the gel coat on the pool contains calcium or not?
    Maddie :) 12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
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