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Thread: Help with shocking

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    skydiva44's Avatar
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    Help with shocking

    I was in the middle of shocking last week and getting no where because my pump was not working properly. I ordered a new bigger pump got it installed but couldn't get it to work for 3 days, so there the green water sat. I poured a jug of bleach in and brushed often, because I had no chlorine in the pool at all it was at zero! Finally got pump running last night. My FAS-DPD last night was 16.5, this morning it is 15, so I did lose some.

    Today's test results"

    PH - 8.2
    TA - 220
    CYA - 30
    FAS-DPD - 15

    Clearly I need to add dry acid to bring down PH. I have a SWG so there is no scale for a CYA of 30 so I am going by the non-SWG chart which means Shock should be 12 and mine is 15, but I DID lose some of that overnight, so should I let it get down to 12 and hold or add more bleach? What chart should I go by?

    This morning I can already see a difference in the color of the water, heading in the right direction.



    Thank you and Happy Easter!
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

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    Butterfly's Avatar
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    Re: Help with shocking

    Shock level is based on CYA level. So, with a CYA of 30, your shock level is about 12, as you said.

    The difference in the non-SWG and the SWG FC/CYA charts is the Min and Target FC levels.

    The shock level is the same based on the CYA

    Happy Easter to you, too!
    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. ~

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    skydiva44's Avatar
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    Re: Help with shocking

    So are you saying I should just keep it at 12 to hold, even though I know I lost some overnight?
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

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    Butterfly's Avatar
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    Re: Help with shocking

    First, I suggest you let your FC drop to below 10 , then re-test the pH and adjust to the mid 7's.

    Second, continue shocking to about 12.

    You lost more than 1 ppm last night, which means the pool failed the overnight test and you need to continue shocking.

    But, it doesn't sound like you are too far away from a sparkly pool
    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!

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    Re: Help with shocking

    What Butterfly said. FC above 10 starts to interfere with the pH test, that's why you should let it drop before making sure the pH is okay.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

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    Re: Help with shocking

    Thanks all.. I'm a newbie too and this is some good info to have my hands on!
    Indiana, ABG 24'x52" Galveston by Blue Cascade (Craigslist $600 w/part of deck included), 13,500 gallons, Intex SWG, solar panel

    My backyard is like a park... Why then does DH always want to go camping??? I just don't understand.

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    skydiva44's Avatar
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    Re: Help with shocking

    Is this normal or ok while shocking for the numbers to change from zero and go back up.... especially with the cc in a two hour time span?


    10:00 a.m.

    PH - 7.5
    TA - 180
    CYA - 40
    FC - 14.5
    CC -0

    1:00 p.m.
    FC = 14
    CC - 1.5
    TC - 15.5

    2:15 p.m.
    FC - 14
    CC - 1
    TC - 15

    This is taking forever for it to hold overnight.....
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

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    frustratedpoolmom's Avatar
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    Re: Help with shocking

    The CC - are you confident it's not a testing error?
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  9. Back To Top    #9
    skydiva44's Avatar
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    Re: Help with shocking

    Pretty confident.....I just had to add drops of the #3 and count, then multiply times .5 right? It has either taken 1 , 2 or 3 drops at the most...
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

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    frustratedpoolmom's Avatar
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    Re: Help with shocking

    Yeah, that's it. I just wondered if the pink portion of the FC test is complete before you are starting the CC test. Is the solution staying clear for like 10 seconds before you begin the CC portion?
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Re: Help with shocking

    Yes....I'm going to redo it again and see if I wait a bit longer if I come up with something different
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

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    skydiva44's Avatar
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    Re: Help with shocking

    I did the test again on the same water, still had some left in my sample bottle and got the same results.....
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

  13. Back To Top    #13
    frustratedpoolmom's Avatar
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    Re: Help with shocking

    Have you replaced the cartridge? This is a metal framepool, right, not the inflateable kind?
    I don't know if this is normal, I'd be guessing at this point which I don't want to do...
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  14. Back To Top    #14
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    Re: Help with shocking

    Yes, cartridge replaced, it's a brand new pump and no not metal, easy set with blow-up ring.


    Edited to add: There is not a great suction going on, so I am going to take it apart and see what the problem is.....could answer alot of questions about the problem I am having.....There's no emoticon for pulling out hair!
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

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    frustratedpoolmom's Avatar
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    Re: Help with shocking

    Ok, while you look into that.... have you scrubbed under the ring at the water line - I know icky stuff can get caught in that crease...

    I guess this is as close to that as I can get:
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  16. Back To Top    #16
    skydiva44's Avatar
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    Re: Help with shocking

    Yes...I did that this past weekend....full of pollen! I can always do it again....thanks FPM!

    I don't know if you are monitoring the ABG thread, but I posted a question there about removing the suction part that is in the pool, I have no plug and water of course is gushing out....how do you do that on your ABG pool?
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

  17. Back To Top    #17
    frustratedpoolmom's Avatar
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    Re: Help with shocking

    Yes, try scrubbing that area again, that could be the lingering CC...reason for the FC not holding.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  18. Back To Top    #18
    skydiva44's Avatar
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    Re: Help with shocking

    please see my last post again, I added a question
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

  19. Back To Top    #19

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    Re: Help with shocking

    I believe Taylor says the tests are correct to 1 drop in 10, so answers plus-or-minus 1 drop are nothing to worry about. Your CC results vary more than that (0 to 3 drops) but if the FC is finding something to chew on, that could produce CC. Given that you said it still isn't holding overnight, it's not hard to imagine it's still consuming something during the day as well.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  20. Back To Top    #20
    skydiva44's Avatar
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    Re: Help with shocking

    Ok it's been a week since my FC held overnight, the water started turning that milky color bluish/gray and I thought I was on my way to a sparkly pool by now. Not....it actually looks as if it is turning green again. Pump has been running 24/7 for the past 3 weeks, I check the filter everyday and change when needed. I vacuum, brush and still it is not clearing. I was starting to see the bottom of the pool 2 days ago but now I can't. My question is could it be mustard algae and I haven't been hitting that shocking target of 29? My cya is 50 so my shock was 20 which is what I did. Also, I did another overnight test last night and I didn't lose any FC so I am puzzled at what to do at this point.

    I know I need some POP...but it is concerning me that It is regressing back to the green instead of clearing up...any thoughts or ideas?

    I did let the FC drop down to 6 and I adjusted my PH to bring down my TA.....Thanks!
    ABG Easy Set 18 x 48
    5455 gallons
    SWG
    Intex Pump 4000 GPM - Size B cartridge

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