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Thread: Where is all my chlorine going????

  1. Back To Top    #1

    Join Date
    Jul 2011
    Location
    Fayetteville, AR
    Posts
    37

    Where is all my chlorine going????

    So, I've had a rough time with my pool this year for some reason..... It was a very warm winter so the pool was extra swampy when I opened it up. But, I SLAMed it, got it sparkling, raised my CYA up to 70 and off we went. Then I went on vacation for a week and the pool was slightly green when I came back. So i SLAMed it again and everything was fine..... until Wednesday. I got home and it was very green and cloudy, and my low salt indicator was lit on my SWG. I added 2 bags of salt and ran a full set of tests:
    FC - 0
    CC - 0
    PH - 6.8
    CYA - <20.... Where'd all my CYA go?!?!?

    I added enough CYA to get me up to 30 (I sat there and squished the sock till it was all dissolved) and started SLAMing..... again. I re-tested yesterday and CYA was at 40 (good enough for now).

    FC - 0
    CC - .5
    PH - 6.8
    CYA - 40

    Added 3 jugs of bleach to get me up to a shock level of 16. Waited an hour and tested again....

    FC - 2
    CC - 1

    Ok, maybe I have more growing than I thought.... Lets add 3 more jugs..... and hour later:

    FC - 0
    CC - 1

    This is seriously starting to concern me. I checked the dates on the bleach and they are all day 160 of this year.

    This morning I added 2 more jugs and went to the store to get more. Came back and:

    FC - 0
    CC - 1

    What the heck?!?!? I've never had this much trouble getting chlorine into the pool.

    Any help would be great!!
    thanks,
    16'x32'x52" Intex AGP
    Intex sand filter, Intex SWG

  2. Back To Top    #2
    Pool Tool's Avatar
    Join Date
    May 2014
    Location
    Western Chicago Area, IL
    Posts
    754

    Re: Where is all my chlorine going????

    Sorry for your trouble. Sounds like ammonia/CYA conversion potentially. See this one and zea3 test process. https://www.google.com/url?sa=t&rct=...rjZZ_NX5_LZwMA
    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

  3. Back To Top    #3

    Join Date
    Jul 2011
    Location
    Fayetteville, AR
    Posts
    37

    Re: Where is all my chlorine going????

    I was hoping that wasn't it..... I'll run test my CYA real quick to see if it's still at 40.
    16'x32'x52" Intex AGP
    Intex sand filter, Intex SWG

  4. Back To Top    #4

    Join Date
    Jul 2011
    Location
    Fayetteville, AR
    Posts
    37

    Re: Where is all my chlorine going????

    Ok, so I just tested and here's the results:

    FC - 0
    CC - 0
    CYA - 40

    So I don't think its ammonia/CYA issue....

    Now, we did just get back from Destin, FL 2 weeks ago and I see that they now have a fecal bacteria problem.... wondering if we brought some of that back on life jackets/swim suits. I did wash everything and soaked the life jackets in bleach water so I'm not sure.....

    Added 3 more jugs of bleach and will re-test in a few (luckily I was able to work from home today, but really wanted the pool open for the long weekend.... )
    16'x32'x52" Intex AGP
    Intex sand filter, Intex SWG

  5. Back To Top    #5

    Join Date
    Jul 2011
    Location
    Fayetteville, AR
    Posts
    37

    Re: Where is all my chlorine going????

    Finally, I have FC!!!!

    FC - 9
    CC - 1

    Dosed it back up and will check again..... No one is really following this so I'm really just posting to keep track and keep me motivated.
    16'x32'x52" Intex AGP
    Intex sand filter, Intex SWG

  6. Back To Top    #6
    Pool Tool's Avatar
    Join Date
    May 2014
    Location
    Western Chicago Area, IL
    Posts
    754

    Re: Where is all my chlorine going????

    Yes, keep posting. We'll catch up and cheer you along

    16' x 32' (21100 gal), vinyl, 1.5 hp Hayward SuperPump,
    Tagelus TA60/60D Sand Filter, Raypak 399K Digital Heater, TF-100

  7. Back To Top    #7

    Join Date
    Jun 2016
    Location
    Poplar Bluff, Missouri
    Posts
    279

    Re: Where is all my chlorine going????

    I've been reading through your posts, so keep posting. Just don't have much to offer as I'm new to TFP and this is my first pool but I have been learning a lot by reading all these threads.
    AGP: 21' x 52" : 10,000 gallon
    100 lb. Sand Filter / 1 hp pump
    11-5 full sun

  8. Back To Top    #8
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: Where is all my chlorine going????

    I LOVE threads where testing is updated as it goes. It's great to see the progress and it's a good way to track for yourself.

    The only thing missing is pictures!
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  9. Back To Top    #9

    Join Date
    Jul 2011
    Location
    Fayetteville, AR
    Posts
    37

    Re: Where is all my chlorine going????

    well, we're getting a little better....

    FC - 10
    CC - 1

    Pool is blue and just slightly dull. Hopefully I can get thru the afternoon with the 4 bottles of bleach I have left....

    - - - Updated - - -

    I'll get some pics in a few.... kinda working on finally posting the build and other stuff we've done the last 3 years since we upgraded to this pool.
    16'x32'x52" Intex AGP
    Intex sand filter, Intex SWG

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