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Thread: SLAM that never ends…?

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    Join Date
    May 2016
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    SLAM that never ends…?

    8 days ago, we noticed the pool was just a little hazy - not really cloudy, but it seemed to have lost its luster. We tested everything and began SLAM, including daily brushing. Our CC is never over .5, and I test it every time to be sure. Our CYA is somewhere between 35 and 50 (I still don't quite have the finesse for reading that thing), so we set SLAM FC goal at 20.

    Pool has been super sparkly and clear for several days, but we can't pass the OCLT. We got close yesterday at 1.5 loss, but this am was 3.5 loss. Do we continue SLAMing???

    Thanks!
    Jill
    D&JButler
    My Pool: 20+K gal vinyl IG; Hayward sand filter with 1 HP pump; Maytronics Dolphin

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    Mr Bruce's Avatar
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    Re: SLAM that never ends…?

    This is the time to remove any ladders, pool lights, check behind skimmer weirs, etc. There is something hiding somewhere!
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

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    Texas Splash's Avatar
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    Re: SLAM that never ends…?

    Good morning Jill. You do need to continue until you pass the OCLT. You may have one of two things happening:
    1 - You still have algae hiding somewhere that is consuming your FC
    2 - Your CYA is actually on the lower end which would require a lower FC. I learned from my own trial & error on OCLTs that more is not always better. So if your CYA is only designed to accommodate 12 FC (as an example), trying to pass an OCLT at 20 or more could result in additional FC loss even with no sunlight.

    So I would first rule-out any hiding places for algae (lights, ladders, steps, etc). If you're good there, consider doing an OCLT at about 12-14FC one time. Also, keep practicing with the CYA testing since that a very critical part of all of this as well.

    Proper lighting is critical for the CYA test, so you want to test for CYA outside on a bright sunny day. Taylor recommends standing outside with your back to the sun and the view tube in the shade of your body. Use the mixing bottle to combine/gently mix the required amounts of pool water and R-0013 reagent, let sit for 30 seconds, then gently mix again. Then, while holding the skinny tube with the black dot at waist level, begin squirting the mixed solution into the skinny tube. Watch the black dot until it completely disappears. Once it disappears, record the CYA reading. After the first test, you can pour the mixed solution from the skinny view tube back to the mixing bottle, shake, and do the same test a second, third, or fourth time to instill consistency in your technique, become more comfortable with the testing, and validate the CYA reading.
    Good luck, and thanks for being a TFP supporter!
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Mod Squad pooldv's Avatar
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    Re: SLAM that never ends…?

    One more idea, has the sand filter had a deep cleaning? Here's how, Deep Cleaning a Sand Filter

    If you say yes to all of the above being clean and checked then drop FC back to 10ish and see how the OCLT does.
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: SLAM that never ends…?

    Oh my goodness! I feel like a jerk. I was exploring old posts and it appears I never replied to any of you for replying with such helpful suggestions. Even though it was last year, I still want to say thank you. If I recall correctly, we thoroughly brushed under the stairs and all around any possible hiding spots, and we also lowered our target FC a bit, and we were able to end slam quickly. So thank you so much for all of your wonderful suggestions!


    D&JButler
    My Pool: 20+K gal vinyl IG; Hayward sand filter with 1 HP pump; Maytronics Dolphin

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    Texas Splash's Avatar
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    Re: SLAM that never ends…?

    Alright! Another SLAM completion. Music to our ears. Enjoy the weekend.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
    If you enjoyed your TFP experience, please consider donating to Support TFP!

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    Patrick_B's Avatar
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    Re: SLAM that never ends…?

    Wow!

    A very short thread for a never ending SLAM!

    Good job on all the hard work!
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  8. Back To Top    #8

    Join Date
    May 2016
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    Re: SLAM that never ends…?




    D&JButler
    My Pool: 20+K gal vinyl IG; Hayward sand filter with 1 HP pump; Maytronics Dolphin

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