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Thread: Newbie, about to use AA method

  1. Back To Top    #1

    Join Date
    Apr 2011
    Location
    Spring, TX
    Posts
    2

    Newbie, about to use AA method

    Recently moved into the house, just now getting into the pool maintenance (service has been taking care of it to this point). There are (confirmed via Vitamin C test) iron stains on the sides and bottom of the pool. Water supply is fine, I suspect that the iron came from the galvanized hardware someone used on the Polaris. Had the Polaris rebuilt properly, and am about to start the AA treatment. Removed the chorine pucks from the skimmer basket (they won't be replaced) 3 days ago.

    Tested the water thoroughly before starting, and I'm a bit confused by the current pool chemistry so I'd like more experienced eyes to backstop me:

    FC 0
    CC 0
    TC 0
    pH 8.2+ (off the top of the scale)
    T/A 130
    CH 240
    CYA 20

    My confusion is with the pH and CYA level. WTH could be causing the elevated pH and will I probably need to add MA in addition to the AA? And why would the CYA be so low when chorine tablets are being used? I was shocked when my chlorine levels dropped to zero in 72 hours.

    Using a TF-100 test kit and tested everything 3 times. (I'm new with pool testing but have extensive experience with testing procedures maintaining marine aquariums - my technique still seems adequate.)
    13K gallon IG plaster with Pac-Fab Nautilus FNS 60 DE filter (120 GPH), 2 HP pump motor and Polaris 380 pool cleaner

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Newbie, about to us AA method

    Welcome to TFP!

    CYA sometimes disappears over the winter. If you started the season with CYA at zero, having at 20 now is very plausible.

    Your TA is a little bit high, lots of rain combined with high TA can drive the PH up.

    In any case you need to get the PH down to around 7.2 before starting the AA treatment.
    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

  3. Back To Top    #3

    Join Date
    Apr 2011
    Location
    Spring, TX
    Posts
    2

    Re: Newbie, about to us AA method

    Thanks for the welcome JasonLion
    Quote Originally Posted by JasonLion
    CYA sometimes disappears over the winter. If you started the season with CYA at zero, having at 20 now is very plausible.
    No idea what it started at, so we'll assume that's the case.

    Quote Originally Posted by JasonLion
    Your TA is a little bit high, lots of rain combined with high TA can drive the PH up.
    Well.. we're in the middle of a drought. Rain can definitely be ruled out.

    Quote Originally Posted by JasonLion
    In any case you need to get the PH down to around 7.2 before starting the AA treatment.
    So, MA first to get to 7.2, then start the AA treatment. Thanks!
    13K gallon IG plaster with Pac-Fab Nautilus FNS 60 DE filter (120 GPH), 2 HP pump motor and Polaris 380 pool cleaner

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