Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 14 of 14

Thread: Afraid of too much chlorine.

  1. Back To Top    #1
    Whatrymes's Avatar
    Join Date
    May 2011
    Location
    E. Bridgewater, MA
    Posts
    132

    Afraid of too much chlorine.

    I'm hoping for many responses. I think that the only way I'm going to have any confidence in my water is hearing from many people that "high" chlorine levels are not risky or uncomfortable. I'm really concerned that I might harm my grand kids et al.

    All my pool life, the warnings are the same: keep chlorine levels between 1 - 3 ppm and never exceed 5 ppm. Suddenly I'm told to double that. I've pushed my numbers to go as high as seven and as low as two ppm with a CYA of 50 ppm and seem to be struggling with green algae hiding behind my ladder.

    Please tell me your experience swimming with CL levels as high as 8 ppm. Any effects? Are we OK? Will we turn green, shrivel up and. . . well you know.

    Every thing else is perfect.
    FC = 4
    CC = .2
    TA = 120
    pH = 7.6
    CH = 250
    CYA = 50
    OCLT = Near zero
    Sparklin' clear.

    Thank you very much.
    15 X 30 X 3.6 Ester williams AGP
    10,800 gallons
    Haywood EC40C90 DE filter 1 HP pump
    TF-100 Test Kit

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,342

    Re: Afraid of too much chlorine.

    You really can swim at FC levels up to the shock level for your CYA. So as long as the FC is below 20 ppm there's nothing to worry about. Nothing is going to happen if you or your GK's do.
    We have personally swam up to shock level and nothing has shriveled up or fallen off. Heck our suits haven't faded out even a little bit.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Afraid of too much chlorine.

    Let's see.... according to my log, roughly a year ago- 7/17/10 - my FC was 16.5 to go with my CYA of 140.

    I'm still alive. Still have the same swimsuit. Had a full eye exam in the interval and nothing out of the ordinary was noted. My pool is still crystal clear and sparkly, although my CYA is now down to about 55, and FC should be around 7 right now, as I just added a quart a couple hours ago.

    What else do you want to know?
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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

    Re: Afraid of too much chlorine.

    My cya is at 50 and I keep my chlorine between 6-8 at all times, sometimes a tad higher depending on who's all in the pool, and we're all still here...lol Seriously, though, I have been using bleach since I converted from baquacil 2 years ago and I have been TROUBLE FREE ever since. I have NEVER experienced algae (except on opening), I don't know if it's because I like to keep my levels higher or not, but I'm sure not going to complain.
    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
    Isaac-1's Avatar
    Join Date
    May 2010
    Location
    SW Louisiana
    Posts
    6,711

    Re: Afraid of too much chlorine.

    What they said

    But seriously if you are that concerned about high FC levels and are going to be worried over operating at above an FC of 5 ppm the alternative is to lower your CYA level through water replacement down to about 30, of course this means sunlight will burn off your Chlorine faster and you will end up using more to maintain that sub 5 ppm level.

    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~

  6. Back To Top    #6

    Join Date
    Aug 2007
    Location
    Jackson, NJ
    Posts
    61

    Re: Afraid of too much chlorine.

    To add to your confidence, my story is the same as Pepsiholic. I am a converted Baquaciloholic (sorry about that) and have been using the BBB method for two trouble-free years. I have three beautiful grandchildren and they swim in my pool at the free chlorine levels posted in Pool School FC/CYA charts. Believe me, there is nothing more precious to me (and they are doing wonderfully!). At 50 CYA you probably need to boost your FC a little higher (with no worries). Some day soon, when you are relaxing by the pool, use your laptop to search through TFP to read some of the posts on chlorine chemistry (Chem Geek is particularly knowledgeable). I have learned enough to be totally confident (and I have an MS in Chemical Engineering).
    phil_d
    20,000 gal. vinyl liner pool
    Hayward Perflex EC-65 DE filter w/1.5 hp Hayward Super Pump
    Liquidator w/ 3/8" upgrade
    Aquabot Jr. pool cleaner

  7. Back To Top    #7

    Join Date
    Jun 2010
    Location
    Glendale, CA
    Posts
    513

    Re: Afraid of too much chlorine.

    I too had very high CYA and thus an algae problem before I got here. I've run my FC as high as 15ppm on a day to day basis and never had any bad experience - no chlorine smell, no faded bathing suits, no stinging eyes. My 3 year old and I swim every day during the summer. Currently my CYA is 70 and I maintain FC at 7ppm.

    The key to this whole discussion is too distinguish between ACTIVE chlorine (Hypochlorous Acid) and chlorine that is held in reserve by the CYA as chlorinated cyanurates. In a pool with 0 CYA, 2ppm of chlorine will have 2ppm Hypochlorous acid in the pool. In a pool with 50ppm CYA and 6ppm FC you have less than 0.1ppm Hypochlorous Acid in the pool at any given moment.

    The problem your pool is having is you have something like 0.01ppm Active chlorine in the water and the algae are able to grow at that level.

    Another key thing to understand is once the chlorine gets "used up" it's converted into salt - regular table salt dissolved in water.

    It's a very technical post but you can view some of the data here : pool-water-chemistry-t628.html

    There is a ton of misinformation out there about chlorine and pool water chemistry in general. It's a real shame that there is no attempt to inform pool owners about the chemistry of CYA.
    16K Gal Plaster | Compupool SWG | Intelliflow VF | TF-100

  8. Back To Top    #8
    Whatrymes's Avatar
    Join Date
    May 2011
    Location
    E. Bridgewater, MA
    Posts
    132

    Re: Afraid of too much chlorine.

    Quote Originally Posted by lightingguy
    I too had very high CYA and thus an algae problem before I got here. I've run my FC as high as 15ppm on a day to day basis and never had any bad experience - no chlorine smell, no faded bathing suits, no stinging eyes. My 3 year old and I swim every day during the summer. Currently my CYA is 70 and I maintain FC at 7ppm.

    The key to this whole discussion is too distinguish between ACTIVE chlorine (Hypochlorous Acid) and chlorine that is held in reserve by the CYA as chlorinated cyanurates. In a pool with 0 CYA, 2ppm of chlorine will have 2ppm Hypochlorous acid in the pool. In a pool with 50ppm CYA and 6ppm FC you have less than 0.1ppm Hypochlorous Acid in the pool at any given moment.

    The problem your pool is having is you have something like 0.01ppm Active chlorine in the water and the algae are able to grow at that level.

    Another key thing to understand is once the chlorine gets "used up" it's converted into salt - regular table salt dissolved in water.

    It's a very technical post but you can view some of the data here : pool-water-chemistry-t628.html

    There is a ton of misinformation out there about chlorine and pool water chemistry in general. It's a real shame that there is no attempt to inform pool owners about the chemistry of CYA.

    I have read a lot on the cya/cl relationship. I can follow it enough to understand the point but what makes it all so unbelievable is that NO one mentions it outside of TFP/pool solutions. Not one who trusts very easily I suppose.
    15 X 30 X 3.6 Ester williams AGP
    10,800 gallons
    Haywood EC40C90 DE filter 1 HP pump
    TF-100 Test Kit

  9. Back To Top    #9

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: Afraid of too much chlorine.

    Taylor talks about it a little bit, but not much more than how CYA can "lock" your chlorine.

    http://www.taylortechnologies.com/Chemi ... ntentID=44

    If you have algae in your pool, even if it's just around the ladder, something needs to be done about it, by the way.
    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
    If TFP has helped you, please click to SUPPORT TFP!

  10. Back To Top    #10
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,089

    Re: Afraid of too much chlorine.

    I have a pair of bright teal trunks that I use every time I swim in the pool. I hang them to dry when I get out. They are never rinsed during pool season. No fading whatsoever after 6 years in my 5ppm FC water.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  11. Back To Top    #11

    Join Date
    Jun 2010
    Location
    Glendale, CA
    Posts
    513

    Re: Afraid of too much chlorine.

    Quote Originally Posted by Whatrymes
    what makes it all so unbelievable is that NO one mentions it outside of TFP/pool solutions.
    I couldn't agree more. It really pisses me off because a lot of people waste a lot of money, but that is the way of our world.

    None of us came here because we found good information elsewhere.
    16K Gal Plaster | Compupool SWG | Intelliflow VF | TF-100

  12. Back To Top    #12
    Whatrymes's Avatar
    Join Date
    May 2011
    Location
    E. Bridgewater, MA
    Posts
    132

    Re: Afraid of too much chlorine.

    Just noticed another thing. If I'm running my CL levels between 4-8 ppm I'm going to need to test with my fas-dpd almost exclusively. By the way, that's a good thing, I'm looking for an excuse to use it all the time. Need to justify the expense you know.

    Sorry, forgot to mention, I'm now shocking the pool, raised the CL level to a little over 20 ppm (CYA = 50), and will maintain this until:

    CC = < .5 ppm
    OCLT = < 1.0 ppm
    and water looks clear.
    15 X 30 X 3.6 Ester williams AGP
    10,800 gallons
    Haywood EC40C90 DE filter 1 HP pump
    TF-100 Test Kit

  13. Back To Top    #13

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,078

    Re: Afraid of too much chlorine.

    Whatrhymes,

    You are absolutely on the right track. Your water will soon sparkle and this gets much easier. Ask lots of questions and be reassured that there is a lot of good science behind the methods taught here.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  14. Back To Top    #14

    Re: Afraid of too much chlorine.

    Believe it or not but I think this method is eventually making progress outside of here... Although not recommended here, Aquachek the maker of test strips has cya in their test and if you buy the package with the laminated card it also contains a booklet that goes into similar theory.

    http://www.aquachek.com/faqs.asp

    Someone is listening.. I could not be happier as a pool owner for 15 years to finally learn how to control it. This site and the folks here at the best of the best.

Posting Permissions

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