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Thread: In the process of a slam

  1. Back To Top    #1

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    In the process of a slam

    Ok, I am in my third day on the SLAM. Here are my numbers and am I still ok?

    FC 39
    CC .5
    Calcium 1300
    CYA 90
    PH 8.2
    27K Gal, IG Plaster, Hayward EcoStar Variable Pump, Pentair DE FNS Plus Filter 24, Hayward AquaRite with extended life T-CELL-15
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    Divin Dave's Avatar
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    Re: In the process of a slam

    your pH test reult is false. WIth FC above 10, the high chlorine causes false pH test result. No need to test for it.

    If your CYA is 90, then, then the FC level is correct for that.

    I know you're in CA and a partial drain and refill is not the most socially favorable thing to do, so really all I can say about your CH and high CYA, is that it is what it is.

    If you haven't done so, search the foum for threads on managing high CH. Once the SLAM is done, you will need to manage that as best you can.
    The search box is top right of the page under the Pool School button.
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

  3. Back To Top    #3

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    Re: In the process of a slam

    How much do I need to drain? Since I am on a well I won't get a fine from the water company.

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    Divin Dave's Avatar
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    Re: In the process of a slam

    If you do not use a saltwater generator for chlorination, then your CYA should be 30-50, so you would need to drain either 1/2-2/3 of the water and refill to get your CYA into recommended range.

    Here are the TFP recommended levels
    Pool School - Recommended Levels

    Depending on what the calcium content of your well water is, may help with the CH.
    Hopefully, the well water isnt too terribly high in CH, and the drain/refill will help tremendously with that
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

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    Re: In the process of a slam

    Have you done an OCLT yet? High CYA is manageable, it's just tough during a slam.

  6. Back To Top    #6

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    Re: In the process of a slam

    I going do the OCLT tonight and it started to rain. Will this cause a problem on numbers tomorrow morning?

    Thanks for the help!

  7. Back To Top    #7

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    Re: In the process of a slam

    Depends on if it's a deluge or not. Hopefully you will be good! Post your numbers

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    Re: In the process of a slam

    So it rained all night and I hope it didn't effect the numbers for the OCLT.

    I was holding at 39 FC and this morning I was at 35 FC, CC is 0, Calcium 1325, CYA 90, water is crystal clear.

    Do I add more beach to bring it back up to 39 and do another OCLT?

    Thanks,

  9. Back To Top    #9
    Texas Splash's Avatar
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    Re: In the process of a slam

    You lost more than 1ppm of FC overnight, so you didn't pass the SLAM. Yes, it would be best to add bleach one more day and maintain the FC at your SLAM level of "35" based on a CYA of 90. Assuming your are sure about that CYA of 90, then make sure your FC is at 35 tonight when you try the next OCLT. You might have better success holding that FC at 35 based on that CYA. Good luck!
    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
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  10. Back To Top    #10

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    Re: In the process of a slam

    So I finally past the OCLT on the sixth day!
    FC level last night 34.5

    Numbers this morning:
    FC 34.5
    CC .5
    Calcium 1375
    CYA 90

    Now what do I need to do? Do I need to add a conditioner once the FC level is at 7 to stop the chlorine from being removed from the sunlight?

    Much help is appreciated.

    Thank you for all of the help!
    27K Gal, IG Plaster, Hayward EcoStar Variable Pump, Pentair DE FNS Plus Filter 24, Hayward AquaRite with extended life T-CELL-15
    The Pool Cleaner Sweep
    Build in 1969
    Water From City
    TF-100 Test Kit

  11. Back To Top    #11

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    Re: In the process of a slam

    NOOOOO. CYA is conditioner/stabilizer. You already have too much in your pool at 90. If you have passed your SLAM (meaning your water is clear also, right?) you just stop adding any chlorine in any form and let the FC level drift down "naturally". Just test once a day until it is back in the target range for your CYA of 90. Then, the TFP method is to add liquid chlorine once a day to keep your FC in your target range. Using liquid chlorine will not raise that CYA level any more.

    If you want to do a water exchange to get the CYA down, you can do that, but if your water is clear and the FC holding overnight, you don't really NEED to. The daily dose of chlorine needed each day is the same whether you're at 90 or 40, so it won't save you any money. Having a lower target FC level will save you on testing chemicals though, as even at the 10 mL test it takes a lot of drops to test your FC.

    edit: 7 is the minimum FC for a CYA of 90. You should start the day at 10 so it has room to drop through the day. Then test at night and bring back up (using poolmath to calculate the dosage required). After a week or so you'll get an idea how much FC you lose each day. Maybe you only need to be at 9 to start the day in the winter, as the FC burns off much slower. You'll have to know your pool.
    10,500 gal IG, Topaz Pebble, auto-level
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  12. Back To Top    #12

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    Re: In the process of a slam

    Yes, the water is crystal clear!

    When do I start using the chlorinator that floats in the pool?

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    Re: In the process of a slam

    Never again. Well, maybe for vacations.

    So now that your water is clear you need to read:
    ABC's of Pool Water Chemistry

    And this will be helpful: Basic Pool Care Schedule
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

  14. Back To Top    #14

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    Re: In the process of a slam

    Yup. That floater has pucks which have CYA in them. Please don't use anything besides liquid chlorine/bleach for your chlorine needs.

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    Re: In the process of a slam

    First question: When testing the "Total Alkalinity". When you add the R7 and then R8 it turn green, then you add R9 until it turns red. Since I have a high chlorine level (31) it shifts to yellow. Do I continue to add R9 drops until I get red?

    Second question: When testing "Calcium Hardness". You add the R10 then R11 and it turns red. Then you add R12 until it turns blue. Do you stop adding the R12 when it turn to violet or all the way to blue?

    Third question: How long should I run my pump?

    Thanks for the help!

  16. Back To Top    #16

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    Re: In the process of a slam

    As with all drops based tests, you continue to add drops until there is NO FURTHER color change.......that ends the test and you subtract one drop since the last one you added made no difference.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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