Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 17 of 17

Thread: SHOCKING!!! Now What?

  1. Back To Top    #1
    phipsi1237's Avatar
    Join Date
    Jan 2011
    Location
    North Las Vegas, NV
    Posts
    228

    SHOCKING!!! Now What?

    Background: Left for 60 days on temporary duty with military. Mom was in charge of the pool. Lots of yellow stuff on sides of the pool towards the end of my 60 days. Mom thought it was due to all the little yellow flowers blowing off the neighbors trees. When I got home, pool was pretty clear, but there was no chlorine in it. I noticed a lot of little yellow patches on the sides of the pool.

    5/18- 4pm: 74deg/FC 0/CC 0/PH 8.2/TA 100/CH 340/CYA 15 /ADD: 90oz LQ, 49oz MA RAISE FC to 5
    5/19- 9pm: 75deg/FC 1/CC 0/PH 8.2/ /ADD: 72oz LQ, 41oz MA RAISE FC to 5
    5/20- 2am: 75deg/FC 1/CC.5/PH 7.2/ /NOT SURE WHY I DIDN'T ADD, POSSIBLY OUT
    5/20- 6pm: /ADD: 56oz LQ, 182oz Bleach RAISE FC to 9
    5/20- 9pm: 76deg/FC 8/CC 1/PH 7.6/CYA 30 /SHOCKING BEGINS /ADD: 182oz Bleach, 48oz LCYA RAISE FC to 14
    5/21-12am: 76deg/FC11/CC1/
    5/21- 5am: /FC6.5/CC.5/PH7.6/CYA 50 /ADD: 2x182oz Bleach RAISE FC to 18.5
    5/21- 9am: /FC15/ /ADD: 182oz Bleach RAISE FC to 21

    Since then, it might have dropped below shock levels once, I kept it above 18 for a day or so, then went to the HIGH SHOCK level. Hasn't dropped below about 23 since then. I check it at least every 2 hours from about 5:30am to 10:00pm or later. I usually end up adding another gallon of bleach or chlorine to bring up from 23/24 to 30. Night before last OCLT dropped by 2. So that was a positive finally. It still drops a lot during the day. But I'm hoping that was due to a CYA of 50 with extremely high chlorine levels. I've added at least 23 or so 182oz jugs of bleach.

    Now what. Last nights drop was from 29 at 9pm to 25 at 5am. It was extremely windy last night, and there's a lot of debris in the pool this morning. Could that have affected the chlorine as well?

    I cleaned the filters about 3 days ago. They were well due for it. I ordered new ones. They came in yesterday, but I didn't want to put the new ones in till the chlorine levels were back down. Should I go ahead and throw them in.

    Any help will be much appreciated. BTW, the pool has been crystal clear for several days with CCs no more than .5. Just waiting to pass the OCLT.


    14K, Plaster, Attached Spa
    14.5K gal Plaster IGP, Intelliflo VS, EasyTouch 8, SWG, IntellipH, Clear and Clean 420 Cartridge Filter, Attached Spa, H400IDL2 NG Heater

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: SHOCKING!!! Now What?

    Now it is time to be patient. The OCLT is a test designed to really get the last vestiges of organics out of your pool and it takes longer than EVERYONE wants it to.

    So the "Now what?" is to keep on keepin' on....you're close.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: SHOCKING!!! Now What?

    Your description sounds like mustard algae to me. Read this and see what you think: pool-school/mustard_algae

    If you think you have mustard algae, I suggest you check the light fixture first!
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  4. Back To Top    #4
    phipsi1237's Avatar
    Join Date
    Jan 2011
    Location
    North Las Vegas, NV
    Posts
    228

    Re: SHOCKING!!! Now What?

    So, I should bring the FC back up to 30? I read the article on the mustard algae and was really hoping to not have to pull the lights. Should I go ahead and install the new filters? The house was purchased a few months ago, and I have no idea if the filters have ever been replaced.
    14.5K gal Plaster IGP, Intelliflo VS, EasyTouch 8, SWG, IntellipH, Clear and Clean 420 Cartridge Filter, Attached Spa, H400IDL2 NG Heater

  5. Back To Top    #5

    Re: SHOCKING!!! Now What?

    Trust me. Pull the lights. I think I would have been done by now if I had done that sooner. If you have a removable ladder I would pull that as well and pour some bleach water in the legs.
    18' x 36' saltwater inground vinyl pool

  6. Back To Top    #6
    phipsi1237's Avatar
    Join Date
    Jan 2011
    Location
    North Las Vegas, NV
    Posts
    228

    Re: SHOCKING!!! Now What?

    I'll do that today. I'll go ahead and get started on the light in the spa since I can drain it into the pool. Just my luck though with the high winds, the temp dropped 5 degrees last night. I have no ladder. So at least I'm good there.
    14.5K gal Plaster IGP, Intelliflo VS, EasyTouch 8, SWG, IntellipH, Clear and Clean 420 Cartridge Filter, Attached Spa, H400IDL2 NG Heater

  7. Back To Top    #7
    phipsi1237's Avatar
    Join Date
    Jan 2011
    Location
    North Las Vegas, NV
    Posts
    228

    Re: SHOCKING!!! Now What?

    I pulled the lights. I bushed the niches out, they looked fine. The 71 degree water felt amazing on my lobster red sun burned back!!! Not really. So, the filter cartridges need to be changed. I was hoping to wait until I was finished shocking. I didn't want to expose the new cartridges to the FC of 30. Or should I go ahead and do it? Could that help with the shocking? I was thinking that it would.
    14.5K gal Plaster IGP, Intelliflo VS, EasyTouch 8, SWG, IntellipH, Clear and Clean 420 Cartridge Filter, Attached Spa, H400IDL2 NG Heater

  8. Back To Top    #8
    phipsi1237's Avatar
    Join Date
    Jan 2011
    Location
    North Las Vegas, NV
    Posts
    228

    Re: SHOCKING!!! Now What?

    Update: I installed the new cartridges yesterday. The OCLT dropped 1.5 down to 27.5. I had to work today, so I went ahead and added another 182oz jug of bleach at 5:30am. Then, I had my mom blindly add 1 gal of liquid chlorline at 9:15am and another at 1:15pm. Tested the water at 4:30, and it was down to 19. I added another 2 gallons of liquid chlorine.

    So...with the drop of only 1.5 on the OCLT, that's the difference in only one drop. I should have tested it twice this morning, but I was running late. And, with that many drops, I would think the error would be greater. Also, would it be possible that it would drop a little more just because the FC is so high to begin with? Also, with the CYA so low, I'm guessing that's why I lost about 28.5 total FC so far today (with all the additions).

    The water is clear as ever, and the CC has been .5 or less for sever days. I'm ready to continue through the night again. However, if I get a drop of only 1.5 in the morning, should I let the FC burn down and see what it does? Thanks for all the help.

    Bill
    14.5K gal Plaster IGP, Intelliflo VS, EasyTouch 8, SWG, IntellipH, Clear and Clean 420 Cartridge Filter, Attached Spa, H400IDL2 NG Heater

  9. Back To Top    #9
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: SHOCKING!!! Now What?

    Bill, the OCLT specifies a loss of 1ppm FC or less.

    See red lines in my sig.

    You are very, very close, so don't quit now!
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  10. Back To Top    #10
    phipsi1237's Avatar
    Join Date
    Jan 2011
    Location
    North Las Vegas, NV
    Posts
    228

    Re: SHOCKING!!! Now What?

    I know!!! Was just hoping there might be other reasons. I tried. I'll keep it up.

    Thanks.
    14.5K gal Plaster IGP, Intelliflo VS, EasyTouch 8, SWG, IntellipH, Clear and Clean 420 Cartridge Filter, Attached Spa, H400IDL2 NG Heater

  11. Back To Top    #11

    Join Date
    Sep 2009
    Location
    Greentown, IN
    Posts
    914

    Re: SHOCKING!!! Now What?

    Better to be safe and get it done for sure the first time than to have to revisit bringing it back up to shock again. Hang in there.
    Indiana, ABG 24'x52" Galveston by Blue Cascade (Craigslist buy w/part of deck included), 13,500 gallons, Intex SWG, solar panels mix 2, TF-100 test kit.

    Test kits compared
    Purchase test kits

  12. Back To Top    #12
    phipsi1237's Avatar
    Join Date
    Jan 2011
    Location
    North Las Vegas, NV
    Posts
    228

    Re: SHOCKING!!! Now What?

    7:45pm: 32.5
    9:45pm: 35/34/32 tested 3 times due to the higher numbers
    5:00am: 31.5/34.5/31.5

    I think I'm good. What do y'all think.

    Bill
    14.5K gal Plaster IGP, Intelliflo VS, EasyTouch 8, SWG, IntellipH, Clear and Clean 420 Cartridge Filter, Attached Spa, H400IDL2 NG Heater

  13. Back To Top    #13
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: SHOCKING!!! Now What?

    Yep, that looks good!
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  14. Back To Top    #14
    phipsi1237's Avatar
    Join Date
    Jan 2011
    Location
    North Las Vegas, NV
    Posts
    228

    SHOCKING!!! Now What?

    3pm: FC 19.5 (yesterday is down to 19 after adding 4 gallons of liquid chlorine and a 182oz of bleach!!!!!) So, appears to have worked!!!

    I added some acid knowing it'd be off the charts. What do I need to let the FC get down to before testing everything else?

    Thanks for all the help on the shocking. It only took a week and about 30 gallons of bleach!!!
    14.5K gal Plaster IGP, Intelliflo VS, EasyTouch 8, SWG, IntellipH, Clear and Clean 420 Cartridge Filter, Attached Spa, H400IDL2 NG Heater

  15. Back To Top    #15
    phipsi1237's Avatar
    Join Date
    Jan 2011
    Location
    North Las Vegas, NV
    Posts
    228

    Re: SHOCKING!!! Now What?

    So... Everything appears to be back to normal. CYA dropped from 50 before the shock process to 30 after. I think I read that it's normal for you to lose CYA while shocking at high FC levels. Is that correct?

    Thanks,

    Bill
    14.5K gal Plaster IGP, Intelliflo VS, EasyTouch 8, SWG, IntellipH, Clear and Clean 420 Cartridge Filter, Attached Spa, H400IDL2 NG Heater

  16. Back To Top    #16

    Join Date
    Jul 2010
    Location
    Philly
    Posts
    332

    Re: SHOCKING!!! Now What?

    Quote Originally Posted by phipsi1237
    So... Everything appears to be back to normal. CYA dropped from 50 before the shock process to 30 after. I think I read that it's normal for you to lose CYA while shocking at high FC levels. Is that correct?

    Thanks,

    Bill
    That's a new one on me. I always chalked it up to testing error or the water being clearer after shocking.
    Bill
    18'X4' 7600 Gal AG
    3/4 HP Pentair Pump
    Hayward S166T 100 lb sand filter

  17. Back To Top    #17
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,334

    Re: SHOCKING!!! Now What?

    You won't lose enough CYA because of the shock process to count. Since you have a cartridge filter you don't backwash, so unless you drained or pump to waste you shouldn't have lost very much CYA at all. If it wasn't water loss I'd chalk it up to a testing error.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

Posting Permissions

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