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Thread: SLAMing plaster pool, too much chlorine?

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    Join Date
    May 2015
    Meriden, CT

    SLAMing plaster pool, too much chlorine?

    Is there such a thing as adding too much chlorine in a plaster pool during a slam? The recommended slam level I got from the poolcalc was 20 (CYA is 50) for my roughly 23K pool. PH is 7.6 and total alkalinity is 90 if that's relevant.

    My pool is pretty green and I've been scooping/brushing algae away for a week. I currently have no metal in the pool (ladder and railing are still in storage), and I don't plan on swimming in it for at least a week. So unless I'm overlooking something, would adding enough bleach to get it to say 50 (or even 100, although I wouldn't do that) cause any harm? I don't want it to drop below 20 overnight
    20K gallon, Plaster IG. Hayward SP2607X10 Super Pump 1-HP, Sand Filter

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    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    East Texas

    Re: SLAMing plaster pool, too much chlorine?

    DON'T DO IT! Too much FC to that extreme will burn off too rapidly to do you any good and possibly damage your equipment. Patience grasshopper!
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
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    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    DFW, TX

    Re: SLAMing plaster pool, too much chlorine?

    Yes, Richard will stop by to give you a can of POP. It will be a big waste of bleach.

    The best ways to speed a SLAM are:
    Scoop everything out of the pool
    Brush several times per day to expose the algae to chlorine and kill it faster
    Early on test every 2-3 hours and add back to SLAM level
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