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Thread: Am I Done Shocking ?

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    Am I Done Shocking ?

    Hi guys,

    So I shocked hard on Sat/Sun. Last night I had a reading of FC=13,CC=.5 in my pool at sundown (CYA = 30). Woke up at 5:30 this morning and the FC was still 13,CC=.5 so that is good. I'm assuming the sun will burn off some today.

    1. So do you think I am done with having to shock the pool ?
    2. If so, how often is it normal to test/add chlorine.

    -S
    sbelgrave @ Westminster, MD
    Size : 16 x 32 x 4
    Volume : 12,000 Gallons
    Material :Vinyl
    Water Type : Non-Saltwater

  2. Back To Top    #2

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    Looks to me like you've done it....nice work.

    With a CYA of 30, I would suggest an FC range of 2-5ppm kept in your pool at all times. Most posters here on the forum report FC losses of around 2ppm daily. Yours will probably be in that range although you will probably get noticeably less FC loss if you up your CYA to 50. That's what I'd do but it's not mandatory....you can operate all summer right where you are.

    So, to answer, those test results indicate your done (does your water look good?)

    and you'll probably need to add chlorine daily or every other day possibly.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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  3. Back To Top    #3
    Mod Squad JohnT's Avatar
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    From the numbers it sounds good, but the key is how does the water look? If it's clear and clean with no "off" odors, then fine. Otherwise keep at it.

    I check my chlorine daily with the OTO test, and weekly with the FAS-DPD test. I usually have to add some every day.

    ETA: Dang it Dave! That's about the third time this Spring I've posted only to find you've posted at the same time. At least we didn't give contradictory answers.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  4. Back To Top    #4
    JasonLion's Avatar
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    Yes, you are good to stop shocking, FC held steady and CC is 0.5 or lower.

    If you are manually adding chlorine you typically need to test and add chlorine once per day. It is best if this is done in the evening, so that the higher FC level before you lose any to sunlight remains overnight, though other times of day will work. If you have a higher CYA level, say 60 to 80, it is often possible to add chlorine every other day.
    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

  5. Back To Top    #5

    Awesome

    Awesome!! Thanks to all you guys for your help. You've been a way better resource than any of my pool service people have been and I honestly think I will be able to open/close my pool down without help now every year which is huge. I'm sure I'll have more questions, but no where as many as I've had over the past few weeks. I'm telling all my friends about this resource. Thanks

    -S
    sbelgrave @ Westminster, MD
    Size : 16 x 32 x 4
    Volume : 12,000 Gallons
    Material :Vinyl
    Water Type : Non-Saltwater

  6. Back To Top    #6

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    JohnT,

    Yeah, Jason usually beats me. I think we may have to start staying up 'til around 2:00AM and beat him that way. Of course, you and I will be the only ones on so we'll have to answer each other's questions. That could get interesting!!
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  7. Back To Top    #7
    SeanB's Avatar
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    Quote Originally Posted by duraleigh
    JohnT,

    Yeah, Jason usually beats me. I think we may have to start staying up 'til around 2:00AM and beat him that way. Of course, you and I will be the only ones on so we'll have to answer each other's questions. That could get interesting!!
    I'm always watching.
    TFP Founder

    My Pool: 13K gal IG gunite with 7' spa, Pentair Cartridge Filter, Intellichlor IC40 SWG, Polaris 280 Cleaner, TF-100 Test Kit w/ salt test.

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