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Thread: The SLAM Methond and Chloramines

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    Join Date
    May 2016
    North Port, FL

    The SLAM Methond and Chloramines

    I am curious as to whether anyone has stumbled across this article, and what anyone might have to say about it. It seems to say that SLAM shouldn't work.

    Is Superchlorinating The Best Way To Eliminate Chloramines? - AQUA Magazine
    12,000 Gallon, In-Ground, Plaster, Cartridge Filter, Solar Heated

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    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Greenville, SC

    Re: The SLAM Methond and Chloramines

    Of course, that plan only works if the added free chlorine really does, in fact, destroy the chloramines. Turns out it only destroys some of them.
    That's not the point of raising the FC to a SLAM level (based on CYA). It's to kill the algae and other "bad stuff". UV breaks down CC just fine on its own.
    35K gallon Krystle Krete (Plaster) - Sand Filter - TF100
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

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    Join Date
    May 2016
    Phoenix AZ

    Re: The SLAM Methond and Chloramines

    The SLAM is done in outdoor, stabilized pools with relatively low bather loads. Most of the issues in that article do not apply to the SLAM.
    50,000 gallon plaster in-ground salt pool with two 60 sq ft DE filters, two Intellichlor IC60 SWGs, two Intelliflo VS pumps, two Whisperflo pumps, two Pentair 400K BTU NG heaters, PCC2000 in-floor cleaning system...two everything.

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    JoyfulNoise's Avatar
    Join Date
    May 2015
    Tucson, AZ

    Re: The SLAM Methond and Chloramines

    Nothing new here.

    There's many problems with the article, namely the insistence on "Breakpoint Chlorination" and the "10X Rule" which is an idea that was debunked here long ago. See these threads -

    Certified Pool Operator (CPO) training -- What is not taught

    Breakpoint Chlorination

    Of course if you add lots and lots of chlorine it's going to generate lots and lots of CCs. And yes, the test kits only measure certain CCs (monochloramine, dichloramine and nitrogen trichlorine). Other halogenated organics do not register. But, DBP's are really only a problem in commercial/public pools and spas where the bather loads are extremely high. This is why those pools need to have secondary oxidizer sources (UV, ozone and peroxide) to handle the DBPs. It is very rare for a residential, single-family outdoor pool to ever register those kinds of bather load levels. Therefore, in private pools, DBPs are really not a concern.

    Finally, the articles insistence that nitrogen trichloride (trichloroamine) is some kind of monster waiting to happen to your pool is nonsense. This post describes how the generation of CC's relate to the FC/CYA ratios we propose and why it is important in a residential pool to use CYA as that limits the generation of noxious nitrogen trichloride -

    Chloramines and FC/CYA

    Since many indoor pool facilities do not use CYA, they tend to generate more of the highly irritating nitrogen trichloride.
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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