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Thread: SLAMing in Phoenix

  1. Back To Top    #1

    Join Date
    Dec 2014
    Phoenix, AZ

    SLAMing in Phoenix

    Long story short - I'm having trouble with mustard algae - clearly yellow, on verticals, in shade. But am losing massive amounts of FC during the day while I'm at work. Not sure if that's Phoenix sunlight at work... and if I'm going to have to find a way to keep FC up during the day?

    Initial Numbers

    PH 7.5
    CL 4.5
    CC 1
    CH 250
    TA 140
    CYA 60

    Night 1: Brought CL up to 25.5 in the evening. Overnight lost 1.5 CL and CC 0.5 (CL = 24)
    Day 1: Brought CL up to 35 before I left for work... and was down to CL of 7 (CC 0.5) when I got home in the afternoon. (lost 28 CL!)
    Night 2: Brought CL back to 28 in the PM, Overnight lost 1.5 CL (CC 0.5)
    Day 2: Brought CL up to 35 before I left for work... and was down to CL 8.5 (CC 0.5) when I got home this afternoon. (lost 26.5)

    Is this normal in Phoenix?
    Sunny Phoenix, AZ
    9K(ish?) gal, IG plaster, DE filter, Hayworth VS pump, TF-100, Poolvergnugen 2x
    Installed early 90s, Remodeled 2016

  2. Back To Top    #2

    TFP Guide
    cowboycasey's Avatar
    Join Date
    Jul 2013
    Fletcher, OK

    Re: SLAMing in Phoenix

    this time of year it is kind of normal, that is a high loss though at CYA of 60 it should not be going that fast.. could you do another CYA test and just see, maybe it is really at 40 or 50 now, that would make sense at those levels... do the test outside, sun to your back, 2 fingers holding tube at waist level and pour back and forth many times, I did at least 10 to 20 times to get a good average of what my levels are..
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

  3. Back To Top    #3

    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: SLAMing in Phoenix

    Are you SLAMming the pool or just adding chlorine?
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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