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Thread: Clogged filters

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    Join Date
    Jun 2015
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    Missouri
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    Clogged filters

    I help run a large pool at a resort. After not inspecting our filter all winter, we found our filter sand was like concrete. We chiseled out old and put new sand in. What could've made our filter sand so hard,like concrete?

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    Mod Squad tim5055's Avatar
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    May 2014
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    Columbia, SC
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    8,494

    Re: Clogged filters

    High CH maybe?
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Join Date
    Jun 2015
    Location
    Missouri
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    Re: Clogged filters

    That's where I'm leaning to the more I read. Since we don't test for this there, its probably the blame. I will get a test for CH.thanks

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    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    Re: Clogged filters

    Have you added any clarifiers? Are you sure? Some multipurpose pool chemicals contain clarifiers. They're designed to stick particles together.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Join Date
    Jun 2015
    Location
    Missouri
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    4

    Re: Clogged filters

    The guy that has been running the pool the last few years does use clarifier. But not a whole lot in this pool. Since we are filling daily with hard well water, I'm leaning towards high CH. And there always seemed to have sediment on the bottom

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