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Thread: My first SLAM (Help please)

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    My first SLAM (Help please)

    I have a 41,000 Pebble Tec pool and I use 10% Kem-Tec liquid bleach as my chlorine source. Have a regular cartridge filter pump so no waste or backwashing. Hate the tabs as they jacked up my CYA last season. Soooooo, I went out of town for a few days and our back yard unexpectedly flooded due to torrential rainfall and my pool became a basin/receptacle for the yard water. When I came back a few days later my pool was a pond. I ran the filter pump non-stop for 2-3 days and kept the FC at 8ish and eventually everything cleared up except I now have light green algae growing on the wall of the deep end of my pool. It goes down from the surface level to about 12 inches below the water in the shaded areas. I am presuming that I need to SLAM and brush the walls? If so, I plan on doing the following unless directed to do otherwise:

    ph is 7.5 and Alk is 100
    Brush the walls to get as much of the green stuff off as is visible
    Dump enough bleach in my pool to get my FC up to 24 (my CYA is ~60)
    Run the filter pump non-stop
    Keep it at 24 for a couple of days while brushing once a day.


    Amirite?
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    41,000 gallon
    Beach entry
    Pebble Tec
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    Re: My first SLAM (Help please)

    Most people would recommend than you lower your pH to around 7.2 first. Here is the poolschool article:
    Pool School - SLAM - Shock Level And Maintain
    Add the chlorine and then brush rather than the other way around.

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    Re: My first SLAM (Help please)

    Quote Originally Posted by MarianParoo View Post
    Most people would recommend than you lower your pH to around 7.2 first. Here is the poolschool article:
    Pool School - SLAM - Shock Level And Maintain
    Add the chlorine and then brush rather than the other way around.
    Thanks. How long after adding the chlorine should I wait before I brush?
    Inground
    41,000 gallon
    Beach entry
    Pebble Tec
    Rock formation slide

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    Re: My first SLAM (Help please)

    Quote Originally Posted by drewtipton View Post
    Thanks. How long after adding the chlorine should I wait before I brush?
    No set time. You add chlorine to the pool to have plenty of killing power. You brush the sides to get any algae that is stuck to the sides up into the water flow.

    You could brush 30 seconds after or three days after.....the point is to brush and keep your sidewalls clean so the chlorine can kill the algae that previously adhered.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Mod Squad tim5055's Avatar
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    Re: My first SLAM (Help please)

    I will also point out that your time table of "a couple of days" is extremely optimistic. Most people who have to SLAM go longer than a week.

    In addition to brushing once a day you have to test and add chlorine to bring it back up to 24 multiple times a day.

    Ho are you testing?

    The only time you should stop the SLAM is when you pass all three tests:

    Pass OCLT
    Water is clear (no visible algae, dead or alive)
    CC less than 1.0
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: My first SLAM (Help please)

    I use the Taylor kit I purchased from TFP!
    The water is very clear. All I have now is the light green growth on the wall that starts at the water surface to about 12 inches down in the deep end where the sun does not shine very much. I really hope it doesn't take a dadgum week since that is all that is left!
    Inground
    41,000 gallon
    Beach entry
    Pebble Tec
    Rock formation slide

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    Divin Dave's Avatar
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    Re: My first SLAM (Help please)

    THe more often you test and add chlorine to keep your FC at or slightly above SLAM level of 24, the quicker the SLAM will go.
    its all about Maintaining the FC level until it's done.

    simple as that.
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

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