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Thread: Calcium Hypochlorite and CYA

  1. Back To Top    #1

    Join Date
    Jul 2008
    Location
    Seacoast, NH
    Posts
    209

    Calcium Hypochlorite and CYA

    Will Calcium Hypochlorite raise my CYA as well as hardness?
    Thanks.
    19,000 gallons
    Stay-Rite System 3 Cartridge filter
    IG vinyl, MasterTemp 400 Propane heater
    Intellichlor 40 SWG, 2006 Taylor Test Kit with Speed Stirrer
    1.5 HP Pump

  2. Back To Top    #2

    Join Date
    Feb 2008
    Location
    Flower Mound, TX
    Posts
    5,062

    Re: Calcium Hypochlorite and CYA

    No, calcium hypochlorite does not contain CYA. It will raise you CH fairly quickly though.
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
    TF Test Kits - Pool Math - Pool School
    "It depends."- JohnT

  3. Back To Top    #3

    Join Date
    Jul 2008
    Location
    Seacoast, NH
    Posts
    209

    Re: Calcium Hypochlorite and CYA

    Thanks.
    19,000 gallons
    Stay-Rite System 3 Cartridge filter
    IG vinyl, MasterTemp 400 Propane heater
    Intellichlor 40 SWG, 2006 Taylor Test Kit with Speed Stirrer
    1.5 HP Pump

  4. Back To Top    #4

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

    Re: Calcium Hypochlorite and CYA

    The basic chemical rules that are independent of concentration of product and of pool size are as follows:

    For every 10 ppm Free Chlorine (FC) added by Trichlor, it also increases Cyanuric Acid (CYA) by 6 ppm.
    For every 10 ppm FC added by Dichlor, it also increases CYA by 9 ppm.
    For every 10 ppm FC added by Cal-Hypo, it also increases Calcium Hardness (CH) by 7 ppm.
    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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