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Thread: Should SLAM continue with noted readings

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    Should SLAM continue with noted readings

    Started TFPC method by SLAM process for pool. The pool water is currently clear. However there is a silty material on steps and floor (began as white/gray, now is a green/yellow) each morning/evening brushing. Should the SLAM process continue with following readings.

    Thank you so very much,

    Alan, Orlando

    FC CC CYA CH TA PH
    4/7/16 8:00 AM 5.5 1.0 60 300 90 7.2 Pre-slam
    4/8/16 8:00 AM 24.0 1.0 60 300 90 Slam
    4/9/16 8:00 AM 22.0 0.5 60 Slam
    4/9/16 4:00 PM 24.0 0.5 60 Slam
    4/10/16 8:00 AM 22.5 0.5 55 Slam
    4/10/16 8:00 PM 15.5 0.5 55 Slam
    4/11/16 8:00 AM 15.5 0.0 60 Slam
    In ground 18' x 40' rounded corners, 3'-7.6' deep, 23,900 gals, plaster, C1200 cartridge filter, county water, Pentair 1hp model WFE-24 pump, with screen enclosure

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    Pool Tool's Avatar
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    Re: Should SLAM continue with noted readings

    Silty - can you feel it? Is it slimy or soft and disintegrate when you rub it? Or rough and does not disintegrate while rubbing it? It sounds like dead algae to me rather than dirt that would be rough. You are winning the battle, but don't give up yet.

    I am assuming your readings above are pre-additions and that you have been trying to keep the FC above 24. But since the levels have been below SLAM levels and because you are seeing something in the water I would continue the SLAM. An OCLT should be done in a day or two prior to dropping levels.

    Good luck and you don't need to worry about re-testing CYA unless you drain water or its been a month or two. Very nice layout of your readings above!
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

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    Mod Squad JVTrain's Avatar
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    Re: Should SLAM continue with noted readings

    I'm assuming you're dosing up to 24 ppm FC after each of these tests? Looks like your CC has gone away, which is good. I would keep brushing as you are and start performing the OCLT at your shock FC level. You still need to pass that criteria as well as the crystal clear criteria because you're still seeing some evidence of algae.

    Let us know what your first OCLT looks like and keep at it!
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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    Re: Should SLAM continue with noted readings

    Thank you for so very much for guidance and compliment. The silt disintegrates when brushes; however the material texture is unknown at this time but will be noted during evening brushing.

    I will return to SLAM level
    In ground 18' x 40' rounded corners, 3'-7.6' deep, 23,900 gals, plaster, C1200 cartridge filter, county water, Pentair 1hp model WFE-24 pump, with screen enclosure

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    Mod Squad JVTrain's Avatar
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    Re: Should SLAM continue with noted readings

    Keep that FC at 24 or even a couple FC higher. Overshooting just a little isn't bad and the more often you test, dose and keep it at 24 FC, the better results you'll have.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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    Mod Squad kimkats's Avatar
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    Re: Should SLAM continue with noted readings

    IF it is in a easy are to get to with a turkey baster you can suck some up with it. Then you put a white paper towel in a strainer and squirt it out to see what it looks like then and when dried. Saying that I really think it is dead algae. Keep on with the SLAM and vacuum to waste if possible.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Re: Should SLAM continue with noted readings

    Hi Team TPFC help group,

    Thank you for helping me bring the pool to TPFC test worthiness.
    Plan to run through today, test tonight and then take OCLT readings in the morning.
    FYI: the water is amazingly clear, sparkling, and and just a slight bit of white/gray silt found on steps and parts of pool floor during brushing. Unfortunately, I do not have a baster to pickup silt to test material type (thanks for process thought).

    Current status:

    FC CC CYA CH TA PH Process Action after test Notes
    4/7/16 8:00 AM 5.5 1.0 60 300 90 7.2 Pre-slam Add 460 Oz. 10.5 NaOCl Slight white/gray silt on steps, clean filter
    4/8/16 8:00 AM 24.0 1.0 60 300 90 Slam Add 135 Oz. 10.5 NaOCl Slight white/gray silt on steps, clean filter
    4/9/16 8:00 AM 22.0 0.5 60 Slam Add 128 Oz. 10.5 NaOCl Slight green/yellow silt on steps, 09:00, clean filter
    4/9/16 4:00 PM 24.0 0.5 60 Slam Good, no action 4/9 @ 16:10
    4/10/16 8:00 AM 22.5 0.5 55 Slam Slight green/yellow silt on steps, 08:00, clean filter
    4/10/16 8:00 PM 15.5 0.5 55 Slam 20:00 reading
    4/11/16 8:00 AM 15.5 0.0 60 Slam Add 192 Oz. 10.5 NaOCl Slight green/yellow silt on steps, 08:00, clean filter
    4/11/16 8:00 PM 22.0 0.0 60 Slam Add 128 Oz. 10.5 NaOCl Slight green/yellow silt on steps, 20:00, clean filter
    4/12/16 8:00 AM 23.0 0.5 60 Slam Add 64 Oz. 10.5 NaOCl Slight green/yellow silt on steps, 08:00, clean filter
    4/12/16 4:00 PM 22.5 0.5 60 Slam Add 64 Oz. 10.5 NaOCl 16:00 reading, clean filter
    4/13/16 8:00 AM 23.5 0.5 60 300 110 Slam Add 23 Oz. 10.5 NaOCl Slight white/gray silt on steps 08:00, clean filter
    In ground 18' x 40' rounded corners, 3'-7.6' deep, 23,900 gals, plaster, C1200 cartridge filter, county water, Pentair 1hp model WFE-24 pump, with screen enclosure

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    Pool Tool's Avatar
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    Re: Should SLAM continue with noted readings

    Again, great records. It really helps pull together the story. I think your OCLT will show your path forward. If no significant drop tonight, then you can call it dirt/dust and not organic.

    One thing that i don't think has been mentioned is an algae search. I had a similar scenario once during a slam and I removed my ladder as recommended. The green crud that come out was disgusting and was my problem! It is also good practice to scrub the skimmer as algae can root in behind the weir. These last bastions of algae can live in areas with poor circulation where local FC levels can be lower than the larger pool volume. Try to do a thorough search and hopefully the OCLT will go well.

    Good luck!
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

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    Mod Squad tim5055's Avatar
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    Re: Should SLAM continue with noted readings

    The OCLT will be telling. My pool almost always has some sort of silt in the bottom from being blown in, and it is especially bad now with the pollen blowing around.

    With your pool any silt that blows in will almost always be very fine because of your screen enclosure.
    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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