Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 13 of 13

Thread: First Shock for new SWG pool

  1. Back To Top    #1

    First Shock for new SWG pool

    I have read the Pool School... likely need another read and I want to shock my pool. I am in the waiting game for my CYA to come up (currently between 30-50 depending on pool store - don't have my TF-100 yet) after adding stabilizer to skimmer. My TC as far as I can tell is about 1. I have a SWG.
    Anyway, I have questions:

    1. Reading the Chlorine vs CYA Chart tells me my pool should be brought to 24 (lowest on SWG scale), but since I am not there yet, can I shock at non-SWG levels to 16 (based on 40CYA)?

    2. I have found different results for this: when can kids swim after shocking? If I shock in evening, by the next day? When levels return to ???

    3. I think my SWG should be turned off when I shock. Correct?

    Thank you!
    Josh S
    ----------------------------
    20.8k gal vinyl kidney; 600sqft surf area, Hayward 1HP Super; 300Lb Sand Filter; Aqua-Rite/T-9; RainbowRay LEDs, Jandy Deck Jets; and a whole 'lotta sweat n time...

  2. Back To Top    #2

    In the Industry


    Join Date
    Feb 2012
    Location
    Phoenix, AZ
    Posts
    728

    Re: First Shock for new SWG pool

    1. Yes, although by the sound of things, you added CYA to get your level up...it just has not registered on test..right? I would still shock to 24.
    2. Shocking is not a one-day thing that you can do in one evening. The time varies, and is based on how long it takes you to pass all 3 tests (in PoolSchool). That being said, you could swim in pool at shock levels if you want to.
    3. Yes, especially when doing you OCLT (overnight chlorine loss test)

    I would re-read the shocking portion of PoolSchool and get a good handle on what the correct process is. This will save you time and money in the long run!

  3. Back To Top    #3
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: First Shock for new SWG pool

    Why do you want to shock your pool?

    Quote Originally Posted by shep377
    1. Reading the Chlorine vs CYA Chart tells me my pool should be brought to 24 (lowest on SWG scale), but since I am not there yet, can I shock at non-SWG levels to 16 (based on 40CYA)?
    Use the FC shock level for you cya level (16)...ignore the swg section for now.

    Quote Originally Posted by shep377
    2. I have found different results for this: when can kids swim after shocking? If I shock in evening, by the next day? When levels return to ???
    As blakej said, shocking is a process not just an overnight adventure With that said, it is safe to swim if you FC is up to your shocking level (for your cya level) and you can see the bottom. I also avoid swimming when CC >0.5 ppm since it can bother the eyes.

    Quote Originally Posted by shep377
    3. I think my SWG should be turned off when I shock. Correct?
    Yes. Use bleach or liquid chlorine to chlorinate.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  4. Back To Top    #4

    Re: First Shock for new SWG pool

    So I shock it up to correct levels for my CYA, and kids should still be able to swim as long as CC < 0.5 and can see bottom. Good.

    Looking at the Shock document - it says until OCLT passes... so I do this and my CL stays up at, say, 16 overnight. Then I just let it drop naturally over a few days be running the pump and turning off or down the SWG?
    Josh S
    ----------------------------
    20.8k gal vinyl kidney; 600sqft surf area, Hayward 1HP Super; 300Lb Sand Filter; Aqua-Rite/T-9; RainbowRay LEDs, Jandy Deck Jets; and a whole 'lotta sweat n time...

  5. Back To Top    #5
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: First Shock for new SWG pool

    Quote Originally Posted by shep377
    Looking at the Shock document - it says until OCLT passes... so I do this and my CL stays up at, say, 16 overnight. Then I just let it drop naturally over a few days be running the pump and turning off or down the SWG?
    There are three criteria to pass before letting the chlorine drop (see my sig), but when you pass jsut let it drop until it is in normal range (for your cya level).

    You didn't answer my question though, why are you shocking?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  6. Back To Top    #6

    TFP Guide

    chiefwej's Avatar
    Join Date
    Jun 2011
    Location
    Tucson
    Posts
    2,853

    Re: First Shock for new SWG pool

    Why are you shocking the pool? What does the water look like? Is there algae? What are the current test levels? In my six years of operating my current pool, I have never had to shock it. Shocking is done for a reason.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

  7. Back To Top    #7

    Re: First Shock for new SWG pool

    My current tests are: TC 1, pH 7.3 and TA 200. A pool store said I had 40 CYA.
    My water seems very clear to me.
    I don't see algae.

    My reason for wanting to shock the pool was that the CL level seems to keep dropping on me. I raise it up with bleach to 3, and then it drops over the next day or two and I have to add more. I know this is standard of sorts because it has been hot and kids playing a lot, but I have a SWG (aqua-rite - t9) running for at least 9 hours per day at 70%. I thought the SWG would hold the levels up where they should be - I mean, that's the point right?!? So I started hunting for more reasons... after reading a lot here in the forum, I decided that it might be something in the water eating the CL so I should fix it by shocking, then the levels may stay where they should be.

    It is likely a matter of me not feeling confident about everything yet!
    Josh S
    ----------------------------
    20.8k gal vinyl kidney; 600sqft surf area, Hayward 1HP Super; 300Lb Sand Filter; Aqua-Rite/T-9; RainbowRay LEDs, Jandy Deck Jets; and a whole 'lotta sweat n time...

  8. Back To Top    #8
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: First Shock for new SWG pool

    You need the CYA up in the 70-80ppm range for the SWG. The SWG adds FC slowly and likely the sun is consuming it ... although if your FC has dropped to 0, then there could also be stuff growing in the pool.

    Do you have your own recommended test kit? If not, there is not way you are going to be able to follow the shock process correctly.

    Do the OCLT (with the pump on and SWG off) to confirm whether or not something is using up the FC that is not the sun.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  9. Back To Top    #9

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,670

    Re: First Shock for new SWG pool

    You may or may not need to shock your pool. Have you inspected your cell for any build up of calcium? The cell itself might not be putting out enough chlorine due to it being dirty. Most likely you have algae that hasn't bloomed due to the SWG keeping it at bay but the algae is consuming all the FC the SWG is putting out. To verify if there is something growing in the pool you need to do the OCLT.

    To save yourself a lot of time and guessing, buy a good test kit, I prefer the TF-100 with the speedstir, http://www.tftestkits.net. The Taylor K-2006 is highly suggested also and can be bought at the same place. Follow the shock process in Pool School, category/pool-school/shocking_your_pool.

    If you need to shock the pool wait to raise the CYA until you are finished shocking. After your pool has passed the shocking process raise the CYA to 70-80 range and the SWG will not have to work as hard to maintain the FC. Follow the FC/CYA chart in Pool School.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  10. Back To Top    #10

    Re: First Shock for new SWG pool

    The good test kit is on the way. I will try the overnight test today as best I can with the kit I have. Hopefully everything will keep "at bay" until I get the TF100 in a few days. Then I can determine exactly what I need to do.

    Its quite a guessing game when youy don't have good results!
    Josh S
    ----------------------------
    20.8k gal vinyl kidney; 600sqft surf area, Hayward 1HP Super; 300Lb Sand Filter; Aqua-Rite/T-9; RainbowRay LEDs, Jandy Deck Jets; and a whole 'lotta sweat n time...

  11. Back To Top    #11
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: First Shock for new SWG pool

    Quote Originally Posted by shep377
    ...
    Its quite a guessing game when you don't have good results!
    BINGO!!

    That is the essence of a troublefree pool!
    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!

  12. Back To Top    #12
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: First Shock for new SWG pool

    In addition to your cya level being low, that t-9 cell is a little undersized for your pool, we recommend getting a cell that 1.5-3 times your pools volume. You can live with what you have, but don't be surprised if you need to run it at the higher settings.

    By the way, here are the swg recommended levels.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  13. Back To Top    #13

    Re: First Shock for new SWG pool

    Well the t15 will be coming in a couple years once I wear this one out! I'm not tossing it just yet . I can't conduct the OCLT yet. I will bring the TC up to level as best I am able for the next few days until my kit arrives, then next week begin working with better numbers and go from there. Thanks everyone.

    Now if only the algae (if any exists) will do nothing for 5 more days... Mmooohhahahaha...
    Josh S
    ----------------------------
    20.8k gal vinyl kidney; 600sqft surf area, Hayward 1HP Super; 300Lb Sand Filter; Aqua-Rite/T-9; RainbowRay LEDs, Jandy Deck Jets; and a whole 'lotta sweat n time...

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •