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Thread: Slam results

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    Slam results

    hey guys just starting things up for the season wanted to make sure things are ok. I switched to the BBB method last sept after figuring out my CYA was well over 200 and had trouble controlling the pool. I did a refill and got the CYA down to 55-60 so pretty happy. Last week I was traveling and forgot to look at chlorine, wifey said pool was a little murky and sure enough chlorine was at 0. I had her add 3 jugs of 8.25 which should get it to around 11-12 that's all I had on hand. After 2 days, pool was crystal clear, but FC dropped to 7 so I figured something was using up the chlorine and figured I would SLAM it yesterday. I checked last night around 9 PM, FC was 20, CC was 0. Looked this AM and FC was 20 and CC was 0. So looks like I am good at this point, I can just let the FC drop to 7-8 correct? Or should I do another day of keeping it at 20?

    My readings Sunday were
    CYA: 55-60
    FC: 7
    CC: 0
    PH: 7.8
    Alk: 70( ill raise that to 100 once the SLAM is done)

    Thanks to all here this works like a champ way cheaper than pool store chemicals and pool sparkles.
    Location Charlotte NC. Pool is a IG vinyl liner, 18X36 lagoon approx. 20,000 gallons odd shaped pool with different depths. 2 skimmers, 3 returns. Hayward 1HP pump, Hayward cartridge filter, Hayward chlorine feeder, Laars 250,000 BTU heater. Stenner pump with #2 tube for chlorine injection. Leslie branded Taylor test kit

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    Mod Squad JVTrain's Avatar
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    Re: Slam results

    As long as your water is crystal clear, you've passed the SLAM criteria. If you catch it very early, your SLAM can be very short.

    Great job catching it early and getting on top of it!

    Also... why raise your TA? If your pH is stable, leave it alone. I'd only raise your TA if it dropped below 60.
    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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    Richard320's Avatar
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    Re: Slam results

    Your SLAM is done. And 70 is just fine for TA. Just maintain pH and FC as usual.

    See, this is the beauty of having your own test kit. You can see what's going on and deal with it effectively, immediately, before it gets out of control.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Mod Squad pooldv's Avatar
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    Re: Slam results

    Nice work! +1 on letting your TA hang out around 60 if your PH is good.
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    Re: Slam results

    So one of things is CSI index, I notice if my TA increases it puts me closer to zero which is where you want to be correct? That's why I was going to increase to TA of 100. I learned so much last year about the evils of Chlorine pucks and CYA. My CYA was so high I couldn't really measure it even at a 4:1 dilution with distilled water. Took out a lot of water but its in a acceptable range now. Next is to get a pump for the chlorine to inject it automatically.
    Location Charlotte NC. Pool is a IG vinyl liner, 18X36 lagoon approx. 20,000 gallons odd shaped pool with different depths. 2 skimmers, 3 returns. Hayward 1HP pump, Hayward cartridge filter, Hayward chlorine feeder, Laars 250,000 BTU heater. Stenner pump with #2 tube for chlorine injection. Leslie branded Taylor test kit

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    Richard320's Avatar
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    Re: Slam results

    Quote Originally Posted by miwitte View Post
    So one of things is CSI index, I notice if my TA increases it puts me closer to zero which is where you want to be correct? That's why I was going to increase to TA of 100. I learned so much last year about the evils of Chlorine pucks and CYA. My CYA was so high I couldn't really measure it even at a 4:1 dilution with distilled water. Took out a lot of water but its in a acceptable range now. Next is to get a pump for the chlorine to inject it automatically.
    Negative CSI won't hurt a vinyl pool. There's no plaster to dissolve.

    And how do you calculate CSI anyway? I didn't see a CH reading in your test results.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Slam results

    Yes CH is 200. So what is really recommended? I mean we get a range of parameters for PH and TA, my understanding is PH should be kept close to the PH of our eyes(read its 7.5) and TA will help prevent PH bounce but too high will raise PH(and irate eyes).

    I think since my PH is 7.8 its should be a little lower say 7.5-7.6
    Location Charlotte NC. Pool is a IG vinyl liner, 18X36 lagoon approx. 20,000 gallons odd shaped pool with different depths. 2 skimmers, 3 returns. Hayward 1HP pump, Hayward cartridge filter, Hayward chlorine feeder, Laars 250,000 BTU heater. Stenner pump with #2 tube for chlorine injection. Leslie branded Taylor test kit

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    cowboycasey's Avatar
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    Re: Slam results

    use MA to take your PH down to 7.4, your TA of 70 will keep your PH from raising as fast and that is a good thing.. everything looks great
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

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    Mod Squad pooldv's Avatar
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    Re: Slam results

    Quote Originally Posted by miwitte View Post
    Yes CH is 200. So what is really recommended? I mean we get a range of parameters for PH and TA, my understanding is PH should be kept close to the PH of our eyes(read its 7.5) and TA will help prevent PH bounce but too high will raise PH(and irate eyes).

    I think since my PH is 7.8 its should be a little lower say 7.5-7.6

    PH between 7.2 and 7.8 is good, 7.5 to 7.8 is ideal. TA as low as 60 is OK as long as your PH remains stable. It is OK to let your TA settle where it wants to.
    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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