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Thread: Need Reassurance with my SLAM...

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    Need Reassurance with my SLAM...

    Hi Everyone,

    Long time listener, first time caller

    Very long story short, last summer was our first with a pool, and we were hard-core "pool stored." I came across TFPC over the winter, became obsessive, and decided to switch over. When we took the cover off last weekend, the pool was green, but manageable looking. My first results with the TF-100 had our CYA at an unreadable amount. I am guessing 250? We decided to get 11,000 gallons of water trucked in to do a partial drain and refill. (We are on a well, the water is hard, and I don't know the status of our well pump equipment enough to risk filling from the well.)

    I started the SLAM process yesterday, and wanted to post my numbers from yesterday and today to see if you all think I am making good progress. The pool looks SUPER clear, but we are still losing FC at a pretty high rate. I guess that means press on... Let me know! Thanks so much!

    Yesterday Pre-SLAM:
    FC - 0
    CC 0
    pH - 7.2
    TA - 140
    CH - 350
    CYA - 110 (best guess - I did it with 2:1 dilution, and the black dot disappeared between 50 and 60)

    added like 12 gallons of 8.25% over the course of the day, trying to keep above 26

    8PM:
    FC - 21
    CC - 1.5
    added 3 gallons of 8.25%, shooting for 31

    9AM:
    FC - 15
    CC - 1
    added 4 gallons of 8.25%, shooting for 31

    10:30AM:
    FC - 30
    CC - .5
    no addition of bleach, will retest again in a little bit

    IMG_3532.jpg
    This picture is from right when we took the cover off.

    IMG_3546.jpg
    This picture is from this morning.
    25,000 gallons, IG, concrete (maybe? some 1980's material), American Products Titan DE filter, 1.0 HP pump, Polaris, very hard well water, must truck in H2O , SE Pennsylvania

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    Mod Squad tim5055's Avatar
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    Re: Need Reassurance with my SLAM...

    Welcome to,TFP!

    You seem to be doing great, keep it up.

    I will caution you that with diluted tests the error rate on the CYA test goes up. When you tested at 55 the error rate saw +/- 10-15%. So your CYA could have been in the range of 45-65. Doubling the 55 you also end up with a doubled error rate. So, your 110 could really be basically 75 - 145.

    I guess that was a long way of saying if the OCLT won't pass you may need to up your shock level some and hold it a little higher.

    Right now it seems you have passed two parts of the SLAM, clear water and CC less than .5. Tonight should be telling.

    Oh, and I think you might listen to a little too much talk radio......
    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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    Azgirl71's Avatar
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    Re: Need Reassurance with my SLAM...

    You are doing great as Tim said. He also addressed CYA test. I just want to say welcome to TFP!
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

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    Re: Need Reassurance with my SLAM...

    Thanks for the quick reply! I'll keep an eye on it, and increase the shock level, if we can't pass the OCLT.

    We are also thinking of switching to a SWG after we pass the SLAM - I am going back to school in August and want to have this as automated as possible before then. I have time to futz around now, but with two kids and class, I think I want this to be as Trouble Free as possible!
    25,000 gallons, IG, concrete (maybe? some 1980's material), American Products Titan DE filter, 1.0 HP pump, Polaris, very hard well water, must truck in H2O , SE Pennsylvania

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    Re: Need Reassurance with my SLAM...

    Just in case anyone comes across this thread and has similar numbers to mine, I increased the shock level to 32ppm, and ended up passing the OCLT a day later!
    25,000 gallons, IG, concrete (maybe? some 1980's material), American Products Titan DE filter, 1.0 HP pump, Polaris, very hard well water, must truck in H2O , SE Pennsylvania

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    Mod Squad tim5055's Avatar
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    Re: Need Reassurance with my SLAM...

    Wonderful!! Glad you passed

    Please remember, that even with automated additions of chlorine you still need to test regularly. It's easy to let life get in the way, but too many folks find out they are not adding enough chlorine or a SWCG has stopped working only after the pool goes green.
    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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    Mod Squad pooldv's Avatar
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    Re: Need Reassurance with my SLAM...

    +1 on what Tim says. It is very important not to let the chlorine level fall below the minimum for your CYA level. Never, ever. Or algae will start growing
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    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: Need Reassurance with my SLAM...

    For sure - I don't feel like going through that again! Thanks again, all
    25,000 gallons, IG, concrete (maybe? some 1980's material), American Products Titan DE filter, 1.0 HP pump, Polaris, very hard well water, must truck in H2O , SE Pennsylvania

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