Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 9 of 9

Thread: COMBINED CHLORINE: keeps fluctuating day to day

  1. Back To Top    #1

    Join Date
    Oct 2012
    Location
    Houston TX 77064
    Posts
    101

    COMBINED CHLORINE: keeps fluctuating day to day

    For the last 7 days CC has been .0 then yesterday .5 on the .5x and the .2x, then today .0 again. I don't know what is causing this, happens about every 10-15 days. Add enough bleach to bring up to 8 every night, losing only .5-1.0 a day rain or shine - ph/ak stable once a week adjustment of .50. Outside temp 50-60 Pool Temp 50-52. Any thoughts?

    yesterday

    C 7.5
    CC .5
    PH 7.8
    AK 90
    CAL 270
    CYA 50

    today
    C 7.5
    CC .0
    PH 7.8
    AK 90
    CAL 270
    CYA 50
    13200 gal, IG, plaster, built 1985, replastered 2012, Mytilus MA-90C cartridge filter, 2716 Blue Line In-ground Pump and Motor (1 HP), (manual clean/brush/test with Taylor K-2006, TFP since 2012) in Northwest Houston TX

  2. Back To Top    #2
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Location
    Elverson Pa.
    Posts
    4,758

    COMBINED CHLORINE: keeps fluctuating day to day

    Are you getting anything in the water, leaves, dirt things of that nature?
    Your still within acceptable range. I've gotten a CC of 0.5 a couple of times. Didn't sweat it. Never had algae.
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  3. Back To Top    #3

    Join Date
    Oct 2012
    Location
    Houston TX 77064
    Posts
    101

    Re: COMBINED CHLORINE: keeps fluctuating day to day

    I do, but try to catch everything a couple times a day. You know, sometimes big raptors clean their kill without leaving a trace (and sometimes they do ). Very interesting.... The pool looks beautiful, so I got a little freaked out - hence check every day gives a better gage of the day to day of what we don't see! Thank you - won't sweat it either.
    13200 gal, IG, plaster, built 1985, replastered 2012, Mytilus MA-90C cartridge filter, 2716 Blue Line In-ground Pump and Motor (1 HP), (manual clean/brush/test with Taylor K-2006, TFP since 2012) in Northwest Houston TX

  4. Back To Top    #4
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Location
    Elverson Pa.
    Posts
    4,758

    Re: COMBINED CHLORINE: keeps fluctuating day to day

    As long as your water looks like it should and your maintaining proper FC levels, which sounds like you are I think your good !
    Good job !
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

  5. Back To Top    #5
    Smykowski's Avatar
    Join Date
    Sep 2011
    Location
    Gurnee, IL (North Suburban Chi-town)
    Posts
    3,065

    Re: COMBINED CHLORINE: keeps fluctuating day to day

    If on the CC test it takes one drop to clear, you're fine.

    The test will turn pink if there are ANY CCs in the water, but the test records it as 0.5. So, while the test result says 0.5, the actual CC in the water could be 0.14.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

  6. Back To Top    #6
    Isaac-1's Avatar
    Join Date
    May 2010
    Location
    SW Louisiana
    Posts
    6,711

    Re: COMBINED CHLORINE: keeps fluctuating day to day

    I am going to make a guess that this may be weather related since we have been experiencing cool fronts about that often for the last couple of months. Perhaps it is caused by something blowing in when the wind changes directions, etc.

    Ike
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

  7. Back To Top    #7

    Join Date
    Oct 2012
    Location
    Houston TX 77064
    Posts
    101

    Re: COMBINED CHLORINE: keeps fluctuating day to day

    Quote Originally Posted by Smykowski
    If on the CC test it takes one drop to clear, you're fine.

    The test will turn pink if there are ANY CCs in the water, but the test records it as 0.5. So, while the test result says 0.5, the actual CC in the water could be 0.14.
    This is new information for me - going in the journal as a Lesson Learnt. Thank you for the clarification.
    13200 gal, IG, plaster, built 1985, replastered 2012, Mytilus MA-90C cartridge filter, 2716 Blue Line In-ground Pump and Motor (1 HP), (manual clean/brush/test with Taylor K-2006, TFP since 2012) in Northwest Houston TX

  8. Back To Top    #8

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,084

    Re: COMBINED CHLORINE: keeps fluctuating day to day

    Emphasizing what smykowski posted, you are within acceptable results on the CC's test so not to worry.

    In addition, what you are experiencing is quite normal. CC's will show up when the FC has combined with something organic to form a different type of unusable chlorine. The FC in your pool combined with sunlight removes those CC's from your pool and that "battle" is going on constantly so you will see movement in your CC's result all the time. The important thing to take away is that you don't want CC's to go above .5 ppm and stay there........then a SLAM may be in order.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  9. Back To Top    #9
    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
    Location
    East Texas
    Posts
    9,003

    Re: COMBINED CHLORINE: keeps fluctuating day to day

    Unless you're actually USING the pool this time of year I'd let the CC# ride and wouldn't bother checking it more than once a week. I don't check mine at all in the winter. BLASPHEMY I know!
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •