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Thread: New pool low Chlorine

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    New pool low Chlorine

    Hi

    Hope you can help.

    Just got my 18,000 gal in ground pool up and running, filled on Friday, the SWG has been running since Saturday morning.

    On testing this morning the test strip showed low for Chlorine, so I took it to a local store to have it more accurately tested and the results were as follows

    Salt 3,000 (as of yesterday, was low until then)
    Chlorine - 0%
    CYA 5ppm

    the hardness and ALK is off right now but I dont believe that has a great effect on the chlorine.

    I have now got the T-15 cell set to 60% and on super chlorinate for 24 hours.

    How long does it take for the chlorine to rise? Or should I be shocking the pool manually? Only reason I have not is that I want to make sure the cell is doing its job. The diagnostics indicate it is.

    Help for a newbie anyone?

  2. Back To Top    #2

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    Re: New pool low Chlorine

    Try testing right in front of the return, you should see some chlorine there.

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    Re: New pool low Chlorine

    it reads between the second colour (still low) and the green ok, so between off yellow and mid green, the test strip goes light green.

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    Re: New pool low Chlorine

    So you are producing chlorine, why are you only running at 60%?

  5. Back To Top    #5

    Re: New pool low Chlorine

    I was told to run it at 50% by the installers, I now have it on 24 hour super chlorinate mode. its a T-15 cell

    The instant salt reading at present is 2900 I added more salt about an hour ago.

  6. Back To Top    #6
    Mod Squad Bama Rambler's Avatar
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    Re: New pool low Chlorine

    You need to raise the FC with chlorine. The SWCG isn't designed to raise the FC from zero. It's designed to keep the FC up under defined conditions once it's there. You're also going to need some CYA (aka, stabilizer or conditioner) in there before the SWCG will keep up with the sun burning off the FC.

    You should read the article in pool school on levels for a SWCG. Then get a good test kit.
    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

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    Re: New pool low Chlorine

    Here is my pool


  8. Back To Top    #8

    Re: New pool low Chlorine

    Thanks, just read the pool school it was very helpful.

    I will go get some pool shock and stabilzer tomorrow. The reason I did not today was becuase the store said if I manually add chlorine how would I know the cell was working? As a newbie this made kinda sense at the time.

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    Re: New pool low Chlorine

    teapot's response is meant to help you test to see if the SWG is working and is not related to your overall issue.

    YOu probably have algae (visible or not) in your pool. The pool store's test results are likely pretty worthless...especially the CYA result.

    You do need to shock your pool and you will have to do it manually to be effective (SWG's aren't any good for shocking) but we need to know an accurate CYA result before we can tell you how high to bring your FC. Simply buying pool "shock" (shock is a verb, not a noun) will likely not help you, it's guesswork.

    !. Do you have reason to believe CYA has ever been put in your pool?

    2. If so, do you know how much?

    3. How does your water look?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  10. Back To Top    #10

    Re: New pool low Chlorine

    Absolutely nothing has been added to the pool other than myself and water

    its new install and filled on Friday evening, the chlorinator was turned on about 8.30am on saturday.

    The water is crystal clear.

  11. Back To Top    #11

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    Re: New pool low Chlorine

    Then your first step is to go to Walmart/Lowe's/HD/Pool Store and purchase enough CYA to raise your pool to 60-80ppm. Then your chlorine will not be burned off by the sun on a continual basis and, in fact, you probably do not have algae at all but your SWG cannot possibly keep up without CYA in the pool.

    Have you discovered Jason's pool calculator in my sig? It'll tell you how much CYA you need to purchase.

    "The ABC's of Pool Water Chemistry" in Pool School will explain in detail the function of CYA and it's relationship to chlorine. Also consult the FC/CYA relationship chart in Pool School.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  12. Back To Top    #12

    Re: New pool low Chlorine

    thanks for the help, i am reading everything right now, I will follow your directions and let you know how it goes

  13. Back To Top    #13

    Re: New pool low Chlorine

    Actually, it is more of a cruise control.

    T-Cell 15 Refers to an Hayward product: Salt reading's ok.
    CYA helps a lot with a SWCG. The less it has to run to give you the same effect, the longer a cell will last. And those cost around 600$ Canadian... so anything that increases life-span is welcome!
    Pool: None, and All.
    ''What's really interesting is finding some way to explain some technical concepts with simple terms so that everyone might understand, to vulgarize.'' CaOCL2

  14. Back To Top    #14

    Re: New pool low Chlorine

    great thanks guys, your help has been awesome

    Off tomorrow to get more salt - stabilizer and pool chlorine.

  15. Back To Top    #15
    chessie6's Avatar
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    Re: New pool low Chlorine

    I like your pool - it looks great! (I love to see pictures of poster's pools). Enjoy it for many years to come!
    Best,
    Jan
    Summer: 19 x 37 Pacific Graphex IG modified oval, aztec marine vinyl liner, 24,000 gal, 3.5 feet to 8 feet, 1 hp Hayward C4025 Swim Clear 4-cartridge filter, 12.5% Liquid Pool Shock for sanitizing, 1 super wide mouth skimmer, 4 returns (2 therapy jets in steps), Hayward Heat Pro heat pump, non-curved pool slide, 6' jump board, 8 ml blue solar cover, TF-100 test kit, had pink algae in 2010 Winter: Hot Springs Vista Spa, 500 gallons.

  16. Back To Top    #16

    Re: New pool low Chlorine

    Thanks Jan

    So today i filled my boots with chemicals and set about balancing the water. First stop was my local testing station, the readings were as expected 0 chlorine 0 CYA low alk low calc, high pH

    So not to rush things the first was to find out my exact gallons which is 17238 (US)

    I was advised to add

    8 cups of CYA - now done
    2 bags of shock chlorine about 3.5 cups - now done
    4 cups muric acid - now done

    The ALk and calc I will leave for tomorrow.

    The cell is now at 0% until tomorrow as advised in the manual.

    I am now going away for 8 days so will not be able to test the results. But I have tested digitally the pH and it is down to 7.01 and on test strip the chlorine reads normal (as expected I guess)

  17. Back To Top    #17
    dmanb2b's Avatar
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    Re: New pool low Chlorine

    8 cups of CYA seems pretty low to me for that size pool. Your CYA level for a SWG pool should be between 60-80. The only way you will be able to confirm that is by getting your own test kit. Stop listening to the store and take charge of the pool. PH at 7 is too low...not sure why they had you add muratic acid.

    BBB is more about knowing what your current water chemistry is and the effects of certain chemicals on that chistry than it is about Bleach, Borax and Baking Soda. Never put something in your water unless you understand why you are putting it in.

    1st step...get a good kit...the Taylor K2006 or TF100.

    Welcome to TFP As you can see, there are plenty of us willing to help, but a full set of test results is what will help us guide you to fine tuning your water.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

  18. Back To Top    #18

    Re: New pool low Chlorine

    Hi

    The pH was up at 8.0 as the water was tested by myself this evening when pH falls anyway (my business is marine fish tanks so have some quite tasty pH testers to hand ) so I am sure the pH will be in tolerance by tomorrow morning.

    As I am just about to go away, I am kinda reliant on the stores but will get a test kit for sure. The CYA I added will take a while to get into the system so i have no time to test again before Wednesday really.

  19. Back To Top    #19

    Re: New pool low Chlorine

    My mistake! No I have not added enough CYA yet, i just worked out how much I have added and how much I should have.

    I have added 3.75LB of CYA where I should have added 6LB

    Will add some more first thing tomorrow.

  20. Back To Top    #20

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    Re: New pool low Chlorine

    Michael, glad to see you made your way to the site.
    24' AGP Sentinelle 54" , 1hp 2 speed power-flo matrix, New 250K to replace the 150k BTU heater, pool roover Jr. Aqua Trol SWG, Large deck, taylor k-2006, Majestic Stairs with colored LED, COLD BEER

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