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Thread: Before I SLAM!

  1. Back To Top    #1

    Join Date
    Jun 2013

    Before I SLAM!

    I plan on SLAMing my pool tomorrow; as there is a slight allergy growth. The water is mostly clear with a very slight haze in the deep end. I plan on starting to SLAM the pool tomorrow and just took a series of readings, which are:

    P.H. = 7.5 - 7.8
    FC = 2ppm
    CC = .5ppm
    TC = 2.5
    TA = 120
    Calcium = 360
    CYA = 60

    I just wanted to run my readings past you guys to see if anything should be adjusted. Is Calcium too high?

    Another question: After I add the liquid chlorine as part of the SLAM, how long should I wait until I take my initial readings?
    Massachusetts - 30,000 Gallons, Inground, Gunite, Hayward Salt Water Generator, T-15 Cell, Hayward C3030 Cartridge Filter.

  2. Back To Top    #2

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

    Re: Before I SLAM!

    Your numbers are fine. Leave them alone.

    If you are confident in your pool size and use it will tell you the correct dosage to get to your SLAM value of 20 ppm so there is no need to test, really.

    That said, most like to test anyway so give it about an hour to distribute evenly in your pool.

    From your initial does, your only tests you will need are FC and CC.

    Keep that FC at 20 as constant as you can.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    Isaac-1's Avatar
    Join Date
    May 2010
    SW Louisiana

    Re: Before I SLAM!

    If your pH tends to drift up rapidly I would suggest lower pH a bit before you start since the pH test is unreliable at FC levels over 10 ppm otherwise good to go.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Before I SLAM!

    Quote Originally Posted by Isaac-1
    If your pH tends to drift up rapidly I would suggest lower pH a bit before you start since the pH test is unreliable at FC levels over 10 ppm otherwise good to go.
    I concur. Add acid to lower pH to 7.2 and forget about it until you've passed the three tests for completion.

    And why wait until tomorrow? If you take FC up to shock level tonight, you won't lose any FC to sunlight; every ounce you add will go to work on the algae. Add the acid, give the pool a brush to loosen the stuff from the walls and mix the acid, and hit it with bleach.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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