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Thread: No cya

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    Join Date
    Jun 2016
    Location
    Bayonne, nj
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    17

    No cya

    Hello... Helping out a friends pool here.... She has an auto chlronitaor but I'm assuming it doesn't work Bc there was no FC registering. Also cya doesn't register either. So my question is should I raise cya before SLAM?

    I'm using the recommended test kit
    It's a brand new 15 round pool
    D.E. Filter
    15 round ..5000 gl..AG...Hayward prefix D.E....tap city water

  2. Back To Top    #2
    Texas Splash's Avatar
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    Jun 2014
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    South-Central Texas, Marion/San Antonio
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    Re: No cya

    New pool and fairly new water then? Yes - take CYA to 30 and increase FC to 12 for SLAM.

    Oh - Don't forget to adjust pH to 7.2 BEFORE increasing the FC.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Mr Bruce's Avatar
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    Mar 2014
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    Greenville, SC
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    Re: No cya

    Yes, get a sock hanging first.

    That might be the reason it SWG doesn't appear to work. Slam it at 20-30 CYA, then get it up to 80 when the water's clear.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  4. Back To Top    #4
    Mod Squad JVTrain's Avatar
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    Feb 2014
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    Central Minnesota
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    Re: No cya

    If they were using the autochlorinator with trichlor pucks after an initial start up without first adding any CYA, it would be difficult to measure CYA until they had used several tablets or more. They would have to have fully dissolved 6 tablets in the feeder to achieve a CYA level near 30 ppm with a 5500 gallon pool volume estimate. Do they know how many tablets have fully dissolved? I would estimate the CYA at 10-20 ppm and target 30 ppm when adding CYA. Remeasure after it has all dissolved. You can proceed with the SLAM after adding that CYA, assuming the CYA is now at 30 until retesting.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
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  5. Back To Top    #5

    Join Date
    Jun 2016
    Location
    Bayonne, nj
    Posts
    17

    Re: No cya

    Yea it is new water..... About 3 weeks old.... Yea I don't think many pucks have dissolved maybe 1..... Ok thank you guys again for the help

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