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Thread: First Overnight Test

  1. Back To Top    #1

    Join Date
    May 2009
    Mauldin, SC

    First Overnight Test

    Hello all,

    My FAS-DPD kit arrived yesterday and I was able to perform my first overnight test. I have not shocked the pool since opening but the water has looked good from the start. I have been using a standard DPD kit to keep my chemistry regulated up until now. I figured that I would shock it after I got the FAS kit just to be on the safe side but it looks like I don't need to. What do you all think?

    Last night 10pm (Turned off SWG)--2.4 FC 0 CC

    This morning 6am--2.2 FC 0.2 CC

    Other numbers are:

    PH 7.6
    TA 100
    CH 225
    CYA 60

    Thanks in advance for the input.

    AGP-11,800 gal-Vinyl-Hayward S180T90 High Rate Pro Sand Filtration System-Chlorease SWG CL02

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: First Overnight Test

    Hey, Mike,

    Those are great numbers and it sounds like your water reflects that. I think it's time to go swimming! Nice work.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: First Overnight Test

    Your FC level is a bit low. A SWG with a CYA of 60 should have a minimum FC level of 3.

    Also, I would raise CYA up to between 70 and 80.
    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

  4. Back To Top    #4
    Butterfly's Avatar
    Join Date
    May 2007
    South Carolina

    Re: First Overnight Test

    Hi Mike,

    Have you seen Water Balance for SWGs in Pool School?

    You might want to do some tweaking.

    Welcome to the forum
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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