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Thread: Opps with a jug of shock

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    Opps with a jug of shock

    Hi guys, I totally calculated my quantities wrong and added a 5lb jug of shock from home depot to my brand new above ground 18 x 52 pool on Monday.... Its Saturday now and my T100 just showed up and I'm not surprised at my results. Would someone in the know mind commenting / pointing me in the right direction with what to do? Thanks in advance>!

    PH 6.8
    CYA 46?
    FC 22.5
    CC 0
    TA 20
    and the Cl was a dark pink/purple

    No-one's been swimming in it cos the family is out of town.. I thought there was a strong odor from the water just after I added that jug! I thought I was going to have to go back for a few more jugs untill I re-read the instructions and safe the fine print where it said "you're a friggin muppet!" lol!

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    Re: Opps with a jug of shock

    I think the experts here will tell you your pH is way too low (should be about 7.5 I think) and your TA should be about 80-100. You're definitely SHOCKED, but the sun will take care of that in a few days. Don't know much, but you shouldn't have any algae this week. LOL BTW, I wouldn't let anyone go in there with a good swimsuit at that chlorine level...it may turn white.

    Great folks here to help you. I'm just a newbie so can't really offer any advice. Be patient and you'll get it though. Wonderful board!


    JJ
    15K gal IG plaster pool
    DE filter
    1 horse pump..don't know flow rate
    Chlorine Feeder
    Pool Newbie (only 3 1/2 years)

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    Butterfly's Avatar
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    Re: Opps with a jug of shock

    JJ is right - too low!

    First, use Baking Soda to raise your TA to about 50. Confirm TA and retest pH.

    Then use borax to raise your pH to about 7.4ish. Do this slowly. Add only about half the amount to get you to 7.4 and circulate an hour and retest. Then ease pH on up to 7.4.

    Then, retest everything and post new test results.

    No swimming!
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    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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    Re: Opps with a jug of shock

    Thank you thank you! Yes - I was sort of expecting it to turn some sort of color other than the sparkling clear it's been all week! It has been a few days and I was hoping the sun would lower the chlorine level a bit more than it has...

    I'm off to the pool calculator then to attempt to figure out how muchBaking soda and borax to add.

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    Re: Opps with a jug of shock

    Just for clarification, you have an 18 foot round above ground pool 52 inches deep and you added 5 pounds of dichlor, correct?

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    Re: Opps with a jug of shock

    At your CYA level, you've basically raised your FC to "mustard shock" level. It'll be fine, and it will go down in a few days. Your ph is low, however, and with a reading of 6.8 it could be even lower, as 6.8 is the lowest that many test kits can measure. One caution though - high FC levels (above 10) tend to make the ph reading wrong, though it usually reads high when the FC is high. You might want to keep an eye on it as the FC comes back down, but you'd like it to be 7.2-7.8.
    [center:1kpalu48]Helpful Links: Pool School | CYA/Chlorine Chart | Pool Calculator[/center:1kpalu48]

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    Re: Opps with a jug of shock

    If you have a TF100, you should be using the FAS-DPD test for chlorine. How you got purple as an answer is beyond me - the color block test in the TF100 is OTO, so it's yellow, not pink. Or orange to brown if astronomically high. Purple shouldn't happen.

    I would recheck the instructions and be sure you're using the right reagents and so on. extended-test-kit-directions-t25081.html

    As an aside, the TA test will go blue to yellow rather than green to red when chlorine levels are really high.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Re: Opps with a jug of shock

    Quote Originally Posted by JamesW
    Just for clarification, you have an 18 foot round above ground pool 52 inches deep and you added 5 pounds of dichlor, correct?

    That's correct

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    Re: Opps with a jug of shock

    Quote Originally Posted by Ohm_Boy
    At your CYA level, you've basically raised your FC to "mustard shock" level. It'll be fine, and it will go down in a few days. Your ph is low, however, and with a reading of 6.8 it could be even lower, as 6.8 is the lowest that many test kits can measure. One caution though - high FC levels (above 10) tend to make the ph reading wrong, though it usually reads high when the FC is high. You might want to keep an eye on it as the FC comes back down, but you'd like it to be 7.2-7.8.

    Mustard - check. Thank you!

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    Re: Opps with a jug of shock

    Quote Originally Posted by Richard320
    If you have a TF100, you should be using the FAS-DPD test for chlorine. How you got purple as an answer is beyond me - the color block test in the TF100 is OTO, so it's yellow, not pink. Or orange to brown if astronomically high. Purple shouldn't happen.

    I would recheck the instructions and be sure you're using the right reagents and so on. extended-test-kit-directions-t25081.html

    As an aside, the TA test will go blue to yellow rather than green to red when chlorine levels are really high.

    I haven't added anything yet, so I'll re- do all the tests again in the morning. Thank you all very much for your input!

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    Re: Opps with a jug of shock

    Right, this is a wee bit embarassing - I've totally gone the wrong direction now. I TRIED to use the pool calc and came up with some numbers but it looks now that I've over done it. I added 40oz of Borax and 40oz of baking soda (the results asked for 80oz but i thought I should try half 1st) and now my CL looks like 5 on the chart or a little darker (7?) and the PH is 8.2 or a shade darker... do I have to fill out all boxes in the calculator to get a reading from the section I'm trying to adjust? When it shows a 'goal' figure, why are there 2 boxes below? I don't have a thermometer - how important is that in the calculations?
    Thanks again...

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    Re: Opps with a jug of shock

    Welcome to TFP!!

    Please don't sweat the little mistakes! In a month, you'll be a pro with maintaining and balancing your pool There is a learning curve for caring for pools and no one is born knowing how to do it.

    Your 'mistake' is not going to harm the pool ( and might actually speed up the learning process )

    All you need to do is test the pool with your TF100 and post the results here - the nice folks here can tell you what you need to add (in the meantime, play with the Pool Calculator -- the first column is what your current readings are, enter your most recent test results (please remember to enter your gallonage at the top! ) - in the second column enter the values you want to be at - at the bottom of each column it will show you your saturation index value 0 is good but, anywhere from +.5 to -.5 is acceptable and won't cause you problems )

    You've done the right thing by coming here and getting your own GOOD test kit! We're gonna get you all set a LOT more quickly than the pool store would
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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    Re: Opps with a jug of shock

    Let me reiterate what Richard said about testing the chlorine. With the high level of chlorine, don't bother with the chlorine test in the blue box. Only use it for the PH. Instead use the chlorine test in the big box. The 870 and 871 reagents. Follow the instructions and you will get the exact chlorine level. The TF 100 does not contain a test for Borates. You will have to get test strips from the pool store for Borates. If you will submit your test results and what you think the pool calculator is telling you before you actually put the chemicals in the pool we will be happy to confirm or correct your results.
    Larry in Texas

    Above ground 7,700 gallons, 19 inch sand filter ( 2 sq. ft.), Liquidator, and a WaterWay Hi-Flo Pump with an A.O. Smith 1 hp SF 1.0 motor.

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    Re: Opps with a jug of shock

    Quote Originally Posted by Txmat
    If you will submit your test results and what you think the pool calculator is telling you before you actually put the chemicals in the pool we will be happy to confirm or correct your results.
    Thank you..! I'll test everything again tomorrow and run it through the calculator, then run it through you guys before i run out to the water and muck it all upagain

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    Re: Opps with a jug of shock

    I did a quick check just now before bed...
    CL 1
    PH 7.6
    CYA 60
    TA 70

    The calculator has a goal for FC but not CL... I didn't get around to any other tests, should I be concerned about CYA being too high? Or CL too low?

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    Re: Opps with a jug of shock

    Ran out and did the FAS-DPD


    FC 8
    CC 0

    so.. TC 0

    I think I'm in good shape no?

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    Re: Opps with a jug of shock

    TC = FC + CC so TC is 8. Yes your in good shape. Your CYA is a little high, but if you use a source of CL that does not contain CYA you should be OK.
    Larry in Texas

    Above ground 7,700 gallons, 19 inch sand filter ( 2 sq. ft.), Liquidator, and a WaterWay Hi-Flo Pump with an A.O. Smith 1 hp SF 1.0 motor.

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    Butterfly's Avatar
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    Re: Opps with a jug of shock

    Well, you ended up in good shape!

    As Txmat said, you don't want to increae your CYA any more, so use only bleach/liquid chlorine.

    With a CYA of 60, keep your FC between 5 & 9 and never below 5.

    Each evening test FC and add enough bleach/liquid chlorine to reach 9.

    Can you post a pic for us?
    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: Opps with a jug of shock

    Thanks guys - 1 more question, how did all these equations, mixes, drops and chemicals get figured out lol!? Do you guys actually understand the chemical principals or are you just familiar with the main chemical names and how to move them up/down?

    I have a picture on my computer here at work but apparently the file is too large to post - I have enough time to respond to a quick post but not to resize a picture.. I'll throw up a few tonight


    Thank you thank you thank you!!!

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    Re: Opps with a jug of shock

    Set up day - I had the sand perfect and I just wanted to watch the kids play in it so much that I let them in way too early, now the bottom is FULL of little foot prints (and collecting dirt )
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