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Thread: Does Calcium Hypochlorite raise CYA??

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    Does Calcium Hypochlorite raise CYA??

    I just drained my pool a little in an attempt to lower my CYA. Does Calcium Hypochlorite raise CYA ??? I have 2 packs left of the Robarb Pool Specialties "Power Blast". Ingredients state Calcium Hypochlorite 68%, other ingredients 32%.
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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    awtrizzle's Avatar
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    Re: Does Calcium Hypochlorite raise CYA??

    Calcium Hypochlorite does not raise CYA. Triclor would from Chlorine Tablets but Cal-Hypo does not.


    16k gallon IG, Hayward Super Pump, Polaris Booster Pump, Hayward DE filter, 2 skimmers and a main drain?, 4 returns that I can see, Vinyl liner w/aluminum coping
    14.5k gallon IG, Vinyl Liner, Hayward SuperPump (1HP 220v motor), Hayward DE Filter
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    Divin Dave's Avatar
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    Re: Does Calcium Hypochlorite raise CYA??

    No. But it will raise the CH. Since you have a vinyl pool, the CH wouldnt be a problem unless it got exhorbitantly high, at which point you stand the risk of calcium precipitation.

    Quote Originally Posted by Donny View Post
    I just drained my pool a little in an attempt to lower my CYA. Does Calcium Hypochlorite raise CYA ??? I have 2 packs left of the Robarb Pool Specialties "Power Blast". Ingredients state Calcium Hypochlorite 68%, other ingredients 32%.
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

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    Feb 2014
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    Upstate, NY
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    Re: Does Calcium Hypochlorite raise CYA??

    Thanks everyone. I will wait till I see what my numbers are before adding it. Thx again.
    20X36 IG vinyl (18,000 gal), 3 sheer descents, Max-Flo 1.5hp VS 2300, Aquarite T15 SWG, C3030 filter, 250,000 BTU heater, Sharkvac XL (Hayward equip)

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