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Thread: cya zero

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    Join Date
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    cya zero

    I just opened my pool. It looks like shrek's swamp. I test cya and it is zero or so low it is not showing up on test. What would be my shock when its this low? The lowest number on cya/chlorine chart is 60
    20,000 gallon viking fiberglass pool w/aqua comfort heat pump, pentair whisperflo pump 1.5hp autopilot dig-220 swg w/RC42 cell (42,000), pg2000 fiber optic lights
    hayward sand filter(medium is echoglass)
    Blue diamond robot cleaner

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    Mod Squad JohnT's Avatar
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    Re: cya zero

    Treat it like you don't have a SWCG for now until you can get some CYA in there.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

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    Re: cya zero

    how much bleach should I shock/add? Sorry but a little rusty at this and I am trying to do 50 things at once with the day off. Thanks
    20,000 gallon viking fiberglass pool w/aqua comfort heat pump, pentair whisperflo pump 1.5hp autopilot dig-220 swg w/RC42 cell (42,000), pg2000 fiber optic lights
    hayward sand filter(medium is echoglass)
    Blue diamond robot cleaner

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    Re: cya zero

    Follow "How to Shock Your Pool" pool-school/shocking_your_pool and use http://poolcalculator.com to determine what your levels need to be.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Mod Squad Bama Rambler's Avatar
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    Re: cya zero

    Shock level for zero CYA is 10 ppm FC. Don't be surprised if your CYA converted into ammonia and you'll need tons of chlorine to get rid of it.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  6. Back To Top    #6

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    May 2009
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    Re: cya zero

    ok thanks
    20,000 gallon viking fiberglass pool w/aqua comfort heat pump, pentair whisperflo pump 1.5hp autopilot dig-220 swg w/RC42 cell (42,000), pg2000 fiber optic lights
    hayward sand filter(medium is echoglass)
    Blue diamond robot cleaner

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