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Thread: SLAM

  1. Back To Top    #1

    Join Date
    Oct 2008
    Yuma, AZ


    Will aerating during SLAM help to keep my TA down?
    14,000gal IG Fiberglass pool with 850 gal spill over spa, Whisper Flo 1hp pool pump, Whisper Flo 2hp spa pump, DE filter, Zodiac Clearwater LM3 SWG, "Heat Siphon" Model SX5HP pool/spa heater, a water leveler and a Kreepy Krauly cleaner

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

    Re: SLAM

    It isn't a good idea to work on adjusting TA while SLAMing the pool. Aeration will raise the PH, and it is generally not possible to measure PH while slamming, thus you can't monitor the process and are likely to raise the PH too far.

    It is much better to deal with TA only when you are completely done SLAMing.

    Also, aeration alone will not lower TA. It is the combination of aeration and acid which lowers TA.
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  3. Back To Top    #3
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Midland TX

    Re: SLAM

    Plus one to Jason's statement.

    Worry about TA later on, it will be fine for now. After you SLAM, it's always more important to worry about pH before TA as well.
    TFP Moderator
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  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: SLAM

    Aerating will not lower TA, but it will raise pH. And since you can't accurately measure pH with FC above 10, you'll never know when or how much acid you need. So don't aerate intentionally.

    Actually, ignore everything except FC during the SLAM process. You set pH before you start and that's it until you've passed the 3 tests:
    1) Water is clear
    2) CC is less than .5
    3) Overnight loss is less than 1

    Once the water is clear and sparkling, you can let the FC drift down below 10 and start adjusting pH again. TA is always the last thing to worry about
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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  5. Back To Top    #5
    BoDarville's Avatar
    Join Date
    Jun 2012
    DFW, Texas

    Re: SLAM

    Great advice given by all!
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