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Thread: FC Usage

  1. Back To Top    #1

    Join Date
    Jun 2013
    Location
    Middlesex County/VA
    Posts
    50

    FC Usage

    Good morning all!

    I am in my first season with BBB and going on my 7th week. Early on I felt I was having a high FC usage. I still feel I do but don't see or find any bad results. Pool is in direct sun all day. I do not use a solar cover. My latest results,

    FC 2.5
    CC 0
    PH 7.5
    TA 90
    CH 40
    CYA 65

    I get levels up to 7.5 to 8 ppm at night and by the next evening I am between 3 and 4 with loses of 4 to 5 a day. With OCLT test there has never been more the 1 ppm drop. My FC was a bit lower at 2.5 last night as I had ran a bit short on bleach the night before. I still estimate approximately 4 ppm drop. Does this seem normal? I had shown levels of 50 ppm CYA about a month ago and I had added a bit more stabilizer thinking that would help as I had average loses of about 4 to 5 then. Pool is crystal clear and sparkling. There has been very little bather load and most most days none. I just want to make sure that I am not missing something. Last night while in the pool I noticed several (8 to 12) waterbugs and can't say which type for certain and it just has me wondering. The sides and bottom are not slick or slimy. Thanks for any help or re assurance you can provide. Going thru 1/2 gallon bleach a day and it is more then what I had anticpated but if it is what it is I am loving my clear pool!!!

    One more thing PH has hld entire time at 7.5 however most recent test on TA was 20 lower then last. Thought this may mean something.
    Pool Size: 24' Lomart Whispering Wind II 13000 gallons
    Pool Type: Aboveground
    Pump:Hayward 1 1/2 HP Power Flo Matrix 2 Speed
    Filter: Hayward S230T 250lb Sand Filter

  2. Back To Top    #2
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Location
    Midland TX
    Posts
    15,001

    Re: FC Usage

    With the pool in full sun all day it isn't unheard of. Depending where you are can make a difference...like the desert South West. This is one of the reasons we encourage folks to add a location to their information. I'm in West TX, and I see a 2-3 loss each day, but I have a good bit of shade. Depending on how much the pool is used had a lot to do with it too. More load on the pool equals more FC use/loss.
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  3. Back To Top    #3

    Join Date
    Jun 2013
    Location
    Middlesex County/VA
    Posts
    50

    Re: FC Usage

    Just updated profile it makes sense that location would help advise. I am eastern VA close to the bay. Sun from 10 til almost 6.
    Pool Size: 24' Lomart Whispering Wind II 13000 gallons
    Pool Type: Aboveground
    Pump:Hayward 1 1/2 HP Power Flo Matrix 2 Speed
    Filter: Hayward S230T 250lb Sand Filter

  4. Back To Top    #4
    pepsiholic's Avatar
    Join Date
    May 2009
    Location
    Fairmont, WV
    Posts
    362

    Re: FC Usage

    I have the same size pool as you. My pool loses between 2 and 3 ppm per day, and is in full sun from sunup until about 8pm. I also use about 1/2 jug of clorox a night. Saw where your cya is 65 and FC was only 2.5, that could be a start. I have my stabilizer set at 50 and never let the chlorine go below 4-5. If yours dipped down to 2.5 you could have something lurking, just waiting to take hold soon.
    24 x 52 Round AG Outback Empire Pool 13,500 gal.
    1 HP Hayward Power-Flo pump w/Hayward 18" 150lb. sand filter
    TF-100 test kit & SpeedStir
    Wanda the Whale Vacuum

  5. Back To Top    #5

    Join Date
    Aug 2011
    Location
    Cochranville, PA
    Posts
    215

    Re: FC Usage

    I am losing about 4ppm as well. Last year I am pretty sure I was about 2ppm. The 4ppm is with no swimming or issues. I am in full sun too. I think a few others have mentioned higher FC consumption this year. I wonder if its something different about the chlorine?
    1) The size of your pool in gallons 4440.
    2) The type filter you have is an Intex 2500 gph and it has a re-useable fabric filter
    3) If your pool is an AG (above ground)
    4) Intex 15 by 48 metal frame.
    5) If you know, tell us the size pump 2500gph and the size (flow rate) of your filter.
    Southeastern, Pennsylvania.

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