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Thread: free chlorine

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    free chlorine

    is it possible to loose all my chlorine in a night i an just starting and had 0 chlorine and added bleach and got it to 10 yesterday and now as of 10 am this morning its around .5 how can i loose this much........what do i need to do . my other chemicals are near perfect
    intex ultra frame 14x48 round ag, intex swg, tf100 test kit

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    UnderWaterVanya's Avatar
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    Re: free chlorine

    Quote Originally Posted by chris400
    is it possible to loose all my chlorine in a night i an just starting and had 0 chlorine and added bleach and got it to 10 yesterday and now as of 10 am this morning its around .5 how can i loose this much........what do i need to do . my other chemicals are near perfect
    The dreaded... A-L-G-A-E strikes again! Sometimes it can be hidden - not visible and lurking silent eating your chlorine.

    You more than likely need to go though the shocking process. Assuming that it is algae - look here: pool-school/defeating_algae

    How are you testing? Can you post a full set of test results?
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
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    Re: free chlorine

    when did you add the bleach? did you do it at night or in the morning? If you have no CYA in your water you will lose chlorine VERY fast due to sunlight. I always add my chlorine at night and get it just above my target level so that during the day I am good.
    13500 gallon AG, build late 90's, Hayward S220T sand filter,1Hp aqua coastal
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    ,

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    UnderWaterVanya's Avatar
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    Re: free chlorine

    Quote Originally Posted by topher
    when did you add the bleach? did you do it at night or in the morning? If you have no CYA in your water you will lose chlorine VERY fast due to sunlight. I always add my chlorine at night and get it just above my target level so that during the day I am good.

    Good point!
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

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    Re: free chlorine

    ph-7.2
    fc-0
    total alkalinity-100
    stabilizer 30-50
    i added my bleach in the morning and it was reading 10 when i left for work yesterday at 130. I have a swg and im trying to get it ready to turn on . havent got my salt yet was trying to get everything right first .
    also when should i put salt in and what kind of salt do i need ?
    intex ultra frame 14x48 round ag, intex swg, tf100 test kit

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    Re: free chlorine

    1. First you need to get your FC stabilized. Can you post a CC or TC number too? How are you testing?
    2. Diamond Crystal Solar Salt from Home Depot or Lowes is just fine.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Re: free chlorine

    i dont have a test that does a cc or tc . my pool place sold me the aquachech test strips in the bottle . how would i get the fc stableized
    intex ultra frame 14x48 round ag, intex swg, tf100 test kit

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    Re: free chlorine

    Well, you have to know why it's not stabilized first. It could be you have organics in the pool (algae, etc.), which can usually be determined by the CC content. Or, you can perform an OCLT. pool-school/overnight_fc_test
    Or better yet, both.

    You need a good test kit to be able to handle your pool. We suggest the TF-100.
    http://tftestkits.net/TF-100-Test-Kit-p4.html
    It will allow you to monitor every necessary aspect of your pool. More importantly, it will allow you to measure high FC levels if it turns out you need to go through the shock process. Do not add a shock product to your pool, as your CYA is already at 30-50 and does not need to go higher until you know for sure why you can't maintain FC.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Re: free chlorine

    I JUST ORDERED THE 100 KIT in the mean time what do i need to do about my fc sence its at 0
    intex ultra frame 14x48 round ag, intex swg, tf100 test kit

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    Re: free chlorine

    Keep putting bleach in it to keep it in range, but until you solve the problem, it's going to keep falling off like crazy. Perform the OCLT as outlined above, see how that goes. Make sure you measure the start and finish while it's dark.

    Also, start reading about the shock process here:
    pool-school/shocking_your_pool
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    UnderWaterVanya's Avatar
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    Re: free chlorine

    Quote Originally Posted by chris400
    I JUST ORDERED THE 100 KIT in the mean time what do i need to do about my fc sence its at 0
    Which specific test strips do you have?
    Do you know your pool volume?
    Have you tried using poolcalculator.com?

    I'd use poolcalculator.com and pour in the amount of bleach suggested to get to the 10ppm level or higher (as high as you can measure on the test strips). Then every few hours (not while sleeping at work etc.) test again and add more based on what you read. If you read 5ppm then punch that into Poolcalculator.com. The strips are not very accurate - but they are better than being totally blind.

    For peace of mind you can also take a sample to the pool store and have them test it - this assume they do not use strips. If their results are close to yours (take a strip sample at the store after they have tested) then you can trust your strips as well as you can their results. Normally pool store results are really not trusted due to operator error, testing kit inadequacy, etc. But in this case you have no info so some info is better than none.

    When you get your test kit - compare it to the strips. You may find you were lucky and have OK strips that are a bit less accurate than you need but not wildly off. You may find that you have crazy results that are complete garbage - some people report that here. My own strips seem not too bad - but I don't use them for routine testing they are just a toy to me now or a tool I can use to tell my in-laws how to verify they didn't forget the bleach the night before.
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

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    Re: free chlorine

    ok thanks guys hopefully my kit will be here soon as i live in alabama and i can get all this stright the pool has just been full for about 3 days now so im not real worried bout alge that much yet and i did have my chlorine to 10 ppm yesterday for a long wile as my strip said the rest of my strip info says my other stuff is in balance according to the strip but i still am like yall on the test kit beeing better
    intex ultra frame 14x48 round ag, intex swg, tf100 test kit

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    Re: free chlorine

    The concern is you don't seem to be holding FC overnight. Perform the OCLT as noted above and see how that goes.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    UnderWaterVanya's Avatar
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    Re: free chlorine

    Quote Originally Posted by chris400
    ok thanks guys hopefully my kit will be here soon as i live in alabama and i can get all this stright the pool has just been full for about 3 days now so im not real worried bout alge that much yet and i did have my chlorine to 10 ppm yesterday for a long wile as my strip said the rest of my strip info says my other stuff is in balance according to the strip but i still am like yall on the test kit beeing better
    Still a little puzzled. If you had 10ppm at one point and then 0.5ppm the next day - you may have lost a lot overnight. Test tonight after sun is off the pool and test again in the morning with sun not yet on the pool. If the loss is minimal - hard to tell with strips - then assume you are OK for now.

    If the CYA is 30-50 and you aren't losing a ton of chlorine overnight you don't need to keep it at 10ppm - you should shoot for 5-10ppm based on the strips and wait for your test.
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

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    Re: free chlorine

    ill check it again when i get home from work tonight it was at about 6 when i left
    intex ultra frame 14x48 round ag, intex swg, tf100 test kit

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    Re: free chlorine

    The key here is to test during the night so we can determine if the chlorine is being used by the sun or by organics in the pool.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Re: free chlorine

    ill check it when i get in and then early in the morn
    intex ultra frame 14x48 round ag, intex swg, tf100 test kit

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    UnderWaterVanya's Avatar
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    Re: free chlorine

    Quote Originally Posted by chris400
    ill check it when i get in and then early in the morn
    Check tonight. If low top it back up to target or a little higher. Then check again (half-hour or hour later) and then wait overnight and check before sun is on the pool.

    Post all of the results.
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

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    Re: free chlorine

    Hold up. This is a newly filled pool correct? Did you actually add any stabilizer/conditioner to the water? Or use trichlor or dichlor?

    If not, then your CYA would be 0 ... regardless what the test strips say ... and the sun will break the FC down very quickly.

    As Robbie has pointed out, the OCLT can still be done to confirm whether anything is living in the pool ... since the sun is not on the water.
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  20. Back To Top    #20

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    Re: free chlorine

    i added no stableizer or conditioner . what is it i need to add is it borax im kinda confused in the conditioner
    intex ultra frame 14x48 round ag, intex swg, tf100 test kit

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