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Thread: Type of Chlorine in Defeating Algae and Shock Your Pool

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    Join Date
    Mar 2007
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    Type of Chlorine in Defeating Algae and Shock Your Pool

    I think that both the Defeating Algae and the Shock Your Pool articles in the Pool School should explicitly mention that the preferred source of chlorine in these cases is chlorinating liquid or bleach, though Cal-Hypo may be used of the CH is low. Trichlor pucks/tabs should not be used as they are too slow to dissolve, are too acidic, and increase CYA. Dichlor should not be used either since it increases CYA by a large amount.
    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: Type of Chlorine in Defeating Algae and Shock Your Pool

    Sounds like a good idea, especially since people are already tending to use trichlor and dichlor, which are adding to their problems in the first place!

    8000 gallon 20' x 48" round vinyl frame pool, 12" sand filter (don't have the specs on the pump), TF100 test kit
    Handy Links: PoolMath, TF-100 Test Kit, Pool School, CYA-Chlorine Chart
    "Shock" is a process, not a product!

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    duraleigh's Avatar
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    Apr 2007
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    Re: Type of Chlorine in Defeating Algae and Shock Your Pool

    Good thought, Richard. We recommend that when we respond, so it should be in Pool School, too.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: Type of Chlorine in Defeating Algae and Shock Your Pool

    I added a statement that is best to use bleach or liquid chlorine to each of those articles.
    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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