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Thread: RIP SWG!! Few Questions...

  1. Back To Top    #1

    Join Date
    May 2011
    Location
    New Jersey
    Posts
    37

    RIP SWG!! Few Questions...

    Good Morning,

    So My SWG is on it's 5th summer and finally decided to implode. The cell burned out. It's visible. I am not in a position financially to replace it right now so I have been using the BBB method for the past week or so. I became very familiar with the pool calculator and BBB last summer when I needed to go through the shock process. Looking back, I think it may have been that the SWG was in its last phase of life and not generating as expected.

    My pool is small but recieves direct sun from 9am to 6pm. The bathing load has been extra heavy these past two weeks due to the heat. The water is crystal clear. ( I thought I had clear water last summer but then I shocked it....) I mean, there are rainbows on the bottom. BUT....

    Here are my questions......

    What target FC should I be aiming for?

    It seems I have been dumping in at least 64 to 101 oz of bleach each night for the past week. That seems high to me. The pool shows a loss of +/- 6ppm per day, maybe more. What should I expect for a loss each day? What should the normal bleach usage be?

    Second, I think I may need to shock. Here's why...I did an OCLT last pm. 8pm results were
    FC 9.5 and CC .5. 7am results were FC 7 and CC .5. That's more than the 1ppm loss but the CC and water clarity are good.

    Third, I am going on vacation from July 4 to July 13. I have no one to manage a shocking process. Last year it took 8 days but I was losing crazy amounts of FC each time I brough it back up to shock level. I ran it 2 days at mustard algea level and that's when it cleared.

    How should I manage this pool when I'm away? I've got NO ONE to help me. (well except my mother in law who can handle pouring 2 cups of bleach a day but that's about the extent).
    Dont' want to come back to a swamp.

    Here's the rest of my numbers at 7pm last night.
    FC 1.5
    CC .5
    PH 7.5
    CYA 70 (I was aiming for a SWG level but not anymore)
    TA 100

    Thanks!!! This board helped me in so many ways last summer.
    Kristyn

    8100 Gal 12X20 vinyl IG pool. Hayward H200 heater, super pump and Pro Grid DE3620 Filter.TF100 test kit

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: RIP SWG!! Few Questions...

    With CYA at 70, in normal operation you want FC between 5 and 10, and never below 5. Your FC level is too low right now, so little wonder you are having problems.

    You lost chlorine overnight, you need to shock. Something is consuming chlorine and the only sure way to get rid of it is to shock. Since the water is clear you will probably be done before you leave.
    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

  3. Back To Top    #3

    Join Date
    May 2011
    Location
    New Jersey
    Posts
    37

    Re: RIP SWG!! Few Questions...

    Thank you. I figured as much. I'm off to BJ's for cases of bleach.

    Will my chlorine consumption during the day slow down when after the shocking is done?

    When I'm back from vacation, should I drain some water to lower the CYA so it's more manageable for bleach? Stupid question.....Does evaporation affect the CYA? I ask because I need add water every 10 days or so.
    Kristyn

    8100 Gal 12X20 vinyl IG pool. Hayward H200 heater, super pump and Pro Grid DE3620 Filter.TF100 test kit

  4. Back To Top    #4
    becky5687's Avatar
    Join Date
    Jul 2008
    Location
    SW Michigan
    Posts
    26

    Re: RIP SWG!! Few Questions...

    I don't think evaporation will affect your CYA level, the CYA is still in the water. The only way to lower it is to remove water (containing the CYA) from your pool and fill with fresh.
    15 X 30 oval AG ~ 12,000 gallons. (completed June 23, 2012)
    1 HP Cooper Ranger Sand Filter
    BBB Method / TF100 Test Kit

  5. Back To Top    #5

    Join Date
    May 2011
    Location
    New Jersey
    Posts
    37

    Re: RIP SWG!! Few Questions...

    That's what I figured as well. Oh well. Finally got the CYA rite for the SWG and the thing goes ka-puff. That's always the way.
    Kristyn

    8100 Gal 12X20 vinyl IG pool. Hayward H200 heater, super pump and Pro Grid DE3620 Filter.TF100 test kit

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