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Thread: How to achieve weekly pool visits.

  1. Back To Top    #1

    How to achieve weekly pool visits.

    I am now maintaining my mothers pool who lives a distance away and is not capable of doing it her self
    I can only make it to her house ever 6-8 days and do NOT wish to use triclor or anything that would RAISE the CYA

    Our current CYA levels are 43 ppm
    and i did a 12 hour test to find we are loosing apx 38 percent of the chlorine over 12 DAY TIME hours..
    this seems to be a stable trend as loss over each 3 hour period was identical.
    with this data i made the following chart
    10 0 hours
    6.2 free cl left at 12 hours or 0.5 days
    3.844 free cl left at 24 hours or 1 days
    2.38328 free cl left at 36 hours or 1.5 days
    1.4776336 free cl left at 48 hours or 2 days
    0.916132832 free cl left at 60 hours or 2.5 days
    0.56800235584 free cl left at 72 hours or 3 days
    0.352161460621 free cl left at 84 hours or 3.5 days
    0.218340105585 free cl left at 96 hours or 4 days
    0.135370865463 free cl left at 108 hours or 4.5 days
    0.0839299365868 free cl left at 120 hours or 5 days


    is there any level of CYA and FCL that would allow this to work. while .5 is ok at 0 ppm of CYA its kill time is far to slow at 50 ppm






    ( made this php script to find cl levels at different loss percent and starting fcls)

    <?php

    ?>
    <form action="cya.php" method= "POST">


    <input type = "text" name ="start" value="starting fcl" size= "20">


    <input type = "text" name ="disa" value="disapation in percent" size= "20">

    <input type = "text" name ="times" value="interval for disapation in hours " size= "20">






    <input type = "submit" name="submit" value ="click to calculate">
    </form>
    <?php


    //////////




    $hours=0;
    $start= mysql_escape_string($_POST["start"]);
    $disa = mysql_escape_string($_POST["disa"]);
    $times= mysql_escape_string($_POST["times"]);
    $disa=(100-$disa)/100;
    echo $start." 0 hours

    </p>";
    while($start>0.1){

    $start=$start*$disa;
    $hours=$hours+$times;
    $dayss=$hours/24;
    echo $start." free cl left at ".$hours." hours or ".$dayss." days

    </p>";





    }






    ?>

  2. Back To Top    #2
    texasdad's Avatar
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    Re: How to achieve weekly pool visits.

    A chlorinator or Stenner pump could keep the chlorine in line for a week at a time. Remember that chlorine demand is going to go way up as the days warm.

    But think long term. If mom isn't able to do any pool maintenance then there are orher household chores she can't do also? Is it time tohave a difficult conversation about downsizing?

    CYA can get over 100 before causing too much trouble. Tabs might be a good temporary solution.
    13k gallon IG gunite pool
    Jandy 2 speed pump
    Jandy cartridge filter
    Stenner Pump and tank

  3. Back To Top    #3

    Re: How to achieve weekly pool visits.

    Thats no fun! This has become a science project for me now. and MY OCD means i must make it work
    without the use of floaters or anything else.


    just liquid CL
    cya
    acid
    bakingsoda
    and borate

    ordered enough borate to bring her pool to apx 40-50 ppm and am thinking this will help with algae and further reduce CL loss due to non UV related causes.


    I am going to run over in the AM to get a true 24 hour reading since so far i only have daytime 12 hour reading i am hoping that 12 hour night will have much less loss. ( 12 hours was about 38 percent loss and im hopping for a total 24 hour loss of 45-50) as i can make this work.. 16 ppm (little less then 2 gal of CL ) will reduce to .5 ppm at 5 day. if my math and logic are sound.

  4. Back To Top    #4
    Richard320's Avatar
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    Re: How to achieve weekly pool visits.

    Put your OCD mind to work on this idea and see if you can solve it for us.
    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!

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    duraleigh's Avatar
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    Re: How to achieve weekly pool visits.

    and i did a 12 hour test to find we are loosing apx 38 percent of the chlorine over 12 DAY TIME hours..
    this seems to be a stable trend as loss over each 3 hour period was identical
    You don't say where you live, but chlorine usage will easily triple in the hot summer months.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

    Re: How to achieve weekly pool visits.

    Their are cool months? Not here lol it's summer already in Florida



    Also 38 percent 24 hour loss. Checking again in 6 12 and 24 hours

  7. Back To Top    #7

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    X-PertPool's Avatar
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    Re: How to achieve weekly pool visits.

    Does the pool get a lot of usage? If it's a pool that gets used rarely or only once a week or so then you could raise the CYA and keep a higher FC through the week.
    -Kevin
    X-Pert Pool Service
    x-pertpool.com
    X-Pert Pool on Facebook and @XPertPoolServic on Twitter
    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

  8. Back To Top    #8

    Re: How to achieve weekly pool visits.

    Raise cya to what and Fcl
    To what? At about 60 ppm cya maxes out on its benefits no?

  9. Back To Top    #9

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    Re: How to achieve weekly pool visits.

    I would say bring it to 70-80 the FC according to the chart should be around 6 but if you are getting minimal usage you can go lower.

    pool-school/chlorine_cya_chart_shock
    -Kevin
    X-Pert Pool Service
    x-pertpool.com
    X-Pert Pool on Facebook and @XPertPoolServic on Twitter
    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

  10. Back To Top    #10
    mas985's Avatar
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    Re: How to achieve weekly pool visits.

    Chemgeek has a few really good charts regarding CYA and chlorine extinction in this thread. There are diminishing returns for higher CYA but I found that running at 80 ppm gives a bit more protection than 60 ppm.

    Also, as an alternative, it is possible to properly run a pool on trichlor tabs. If the pool has a sand filter and requires frequent backwashing and/or removing water due to rain, the CYA level will not climb as fast and may even remain stable at some point. It just requires monitoring the CYA level to make sure it doesn't get too high.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  11. Back To Top    #11

    Re: How to achieve weekly pool visits.

    FL is one of the cheapest states for weekly pool maint.

    You could get someone for $60-75 per month including chems.
    Julie
    I have a small (3,750 gallon) in-ground, Viking pool - 2hp Jandy pump, AquaPure 700 Cholorinator, Jandy Aqualink, and Jandy CJ250 filter

  12. Back To Top    #12

    Re: How to achieve weekly pool visits.

    Hmm most I found in the 60-75 range only did Chem or If they did clean they charged for chem


    But still question remains how do they get away with once a week?
    I see most of then only use liquid cl or dry never any of the "pucks"

  13. Back To Top    #13

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    Re: How to achieve weekly pool visits.

    What do you guys think about adding a phosphate reducer such as pool perfect in this situation? It seems the pool will not have much load if any and it would help eliminate the algae food. The sanitation might not be perfect but it might help control an algae outbreak if the FC gets low.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  14. Back To Top    #14
    Melt In The Sun's Avatar
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    Re: How to achieve weekly pool visits.

    There are some services in Arizona that do weekly visits with great success, using chlorine gas and very high CYA. The CYA is maintained >100, and each week the pools get injected up to somewhere around 20 ppm FC, which is high enough that there's still some left at the end of the week. I don't see why the same thing wouldn't be possible using bleach.

    Still, I think an SWG would be an easier solution.
    11,200 gal, Pebble-Tec; Tristar 2-speed 1hp - Swimclear 325 ft2 cart - SWG - A & A in-floor cleaner - Heat pump. For the poolside cooking, a Yoder Wichita and a Big Steel Keg!
    TF Test Kits -- PoolMath -- Pool School
    Make each day your masterpiece. - John Wooden

  15. Back To Top    #15

    Re: How to achieve weekly pool visits.

    According to all the charts retention seems to cap out at 99 percent an hour for any cya above 60 .

    After talking with some pool guys who do weekly maint
    I think I will go with 50 cya and bring the pool to a cl level that leavs
    0.1-0.5 ppm for the next week


    I am having fun experimenting . Yesterday for example only had 10 percent cl loss for the whole 24
    Hours

  16. Back To Top    #16
    XsAllOverIt's Avatar
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    Re: How to achieve weekly pool visits.

    I'm suprised noone suggested this. Using an SWG would work and you don't have to add any chlorine. The only thing I add regularly is Muriatic acid since my pH climbs with a waterfall. I could easily maintain my pool once a week with my SWG during the summer.
    18 x 36 Inground Gunnite, White Plaster 21K gallon
    18" raised spa, 8' Diameter (620 gallon)
    Triton II Sand filter, Intellichlor IC40 SWG
    Pentair Pump, Max-E-Therm 400 BTU
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  17. Back To Top    #17
    linen's Avatar
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    Re: How to achieve weekly pool visits.

    Quote Originally Posted by attr
    I think I will go with 50 cya and bring the pool to a cl level that leavs
    0.1-0.5 ppm for the next week
    I would aim for higher than 0.5 for your FC droop. Poolcalculator gives me 4 as a minimum at 50 ppm CYA. Is the pool being used during the week? I am thinking if you have no bather load, maybe a cover and also no organics (leaves, pollen, etc.) getting into the pool, you might be able to get by with a lower FC.

    By the way, I third the vote for a SWG.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  18. Back To Top    #18

    Re: How to achieve weekly pool visits.

    Ok I will look into a swg however I think my point of .5 ppm was missed this would not be the value all week just when I return. It would be about 1 ppm the day before 2 before thy and 4 before that again just talking about loss to uv

  19. Back To Top    #19
    linen's Avatar
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    Re: How to achieve weekly pool visits.

    Quote Originally Posted by attr
    Ok I will look into a swg however I think my point of .5 ppm was missed this would not be the value all week just when I return. It would be about 1 ppm the day before 2 before thy and 4 before that again just talking about loss to uv
    I still feel that is to low of a droop. I would shoot for something higher, especially if there are no swimmers during the week...by the way you haven't answered that question, will there be swimmers in the middle of the dosing cycle? If there are swimmers, then it is more of a balancing act and even more of a candidate for the swcg or liquidator.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  20. Back To Top    #20

    Re: How to achieve weekly pool visits.

    Maybe gets light use once every other week

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