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Thread: cloudy water and 0 Chlorine

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    cloudy water and 0 Chlorine

    For the last month I've been trying to get chemistry of my new pool into the limits. My main issue was a strong smell of chlorine.

    We were out this weekend, so I didn't check pool for a few days. When I checked pool on Monday, there was absolutely no smell, but tests showed no Chlorine either (I have tablet chlorinator so there should be some) and water became cloudy. That night I shocked my pool. When I tested pool Tuesday night, there was again no smell and no Chlorine again. Tuesday night I shocked it with 2 bags. Wednesday morning same thing, so Wednesday night I tried to shock it with 3/4 gallon of 15% Chlorine. Today there is 0 Chlorine again.

    I think low chlorine and cloudiness related, but how? If it would be Algee then it would be killed by now and there would be a smell.

    Here is my test from today, it's been the same for the week (ph was 7.8 in the beginning of the week, before I added acid):

    FAC=0
    TAC=0
    CH=200
    CYA=20
    TA=110
    pH=7.2
    TDS=500
    Phosphates=700

    As this point I am trying to get rid of Phosphates so I added Phos Free.

    Does anyone have any recommendation on what could be going on? When pump is on, there is Chlorine in the pool, about 1.0ppm.

    Thanks,

    Vadim
    15,000 gallon IG pebbletech pool; spill over spa; Hayward EcoStar pump; Hayward SwimClear Cartridge Filter; Series 2 Trident UV system; Hayward H-Series heater; Hayward ProLogic control; Solar; San Francisco bay area;

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    linen's Avatar
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    Re: cloudy water and 0 Chlorine

    Welcome to tfp, kutsyy

    The strong chlorine smell was "combined chlorine" (CC). CC is the byproduct of chlorine killing organics, when you have it (in your case smell it), it is a sign that you have a problem.

    Quote Originally Posted by kutsyy
    When I checked pool on Monday, there was absolutely no smell, but tests showed no Chlorine either (I have tablet chlorinator so there should be some) and water became cloudy.
    This makes sense, you had no chlorine due to algae in the pool and therefore were also not producing CC. It is likely the chlorinator can not keep up with the algae growth rate.

    Quote Originally Posted by kutsyy
    I think low chlorine and cloudiness related, but how? If it would be Algee then it would be killed by now and there would be a smell.
    Since your pool is low in FC and you have smelled CC, you need to do the SLAM process. Keep in mind it is a process and not a one time act and can take a few days to kill the algea. See: http://www.troublefreepool.com/pool-...king_your_pool

    To do the process correctly and efficiently you will need an appropriate test kit. See: http://www.troublefreepool.com/pool-...kit_comparison Many of us have the tf-100 since it is the best value.

    Quote Originally Posted by kutsyy
    Tuesday night I shocked it with 2 bags.
    What were in the two bags? We recommend doing the SLAM procedure using bleach/liquid chlorine.

    Quote Originally Posted by kutsyy
    As this point I am trying to get rid of Phosphates so I added Phos Free.
    I would return the phosfree...phosphates do not matter in a properly chlorinated pool.

    Make sure to spend some time in pool school (link is always near the upper right of page).
    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.

  3. Back To Top    #3

    Re: cloudy water and 0 Chlorine

    Thank you for quick responce.

    Quote Originally Posted by linen
    Quote Originally Posted by kutsyy
    I think low chlorine and cloudiness related, but how? If it would be Algee then it would be killed by now and there would be a smell.
    Since your pool is low in FC and you have smelled CC, you need to do the SLAM process. Keep in mind it is a process and not a one time act and can take a few days to kill the algea. See: http://www.troublefreepool.com/pool-...king_your_pool
    But there was absolutely no smell. I did read about SLAM, unfortunately I didn't have time.
    Quote Originally Posted by linen

    To do the process correctly and efficiently you will need an appropriate test kit. See: http://www.troublefreepool.com/pool-...kit_comparison Many of us have the tf-100 since it is the best value.
    I have Oreq deluxe test kit (given by the contractor).
    Quote Originally Posted by linen
    Quote Originally Posted by kutsyy
    Tuesday night I shocked it with 2 bags.
    What were in the two bags? We recommend doing the SLAM procedure using bleach/liquid chlorine.
    Bags are shockplus by aquachem (also left by contractor). I know that liquid is better, and that's what I did next day.
    Quote Originally Posted by linen

    Quote Originally Posted by kutsyy
    As this point I am trying to get rid of Phosphates so I added Phos Free.
    I would return the phosfree...phosphates do not matter in a properly chlorinated pool.

    Make sure to spend some time in pool school (link is always near the upper right of page).
    too late on phosfree, I already used half of it, but right now I am trying to bring chemistry to "perfect" settings. I did (still) read pool school and I was not too worried about Phosphates but at this point I want to make clean it right.

    So My understanding is that it is due to algea, even if I don't see/feel any, right? Fact that there is no smell of free chlorine is ok too, right? And at this point you I need to follow SLAM procedure to make sure that I kill all algea.

    In meantime, I am assuming that pool is safe to swim in, right?

    Thank you,

    Vadim
    15,000 gallon IG pebbletech pool; spill over spa; Hayward EcoStar pump; Hayward SwimClear Cartridge Filter; Series 2 Trident UV system; Hayward H-Series heater; Hayward ProLogic control; Solar; San Francisco bay area;

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    duraleigh's Avatar
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    Re: cloudy water and 0 Chlorine

    Read "The ABC's of Pool Water Chemistry" up in Pool School. The importance of adequate chlorine cannot be over emphasized.

    Smell or no smell is somewhat irrelevant.....if you have no chlorine in your pool, you will develop algae (and you have).

    If you cannot find the time to SLAM the pool (it may take several days), you will continue to be plagued by cloudy water and algae.

    I am surprised by your CYA of 20 ppm. Using pucks to chlorinate, your CYA would normally be much higher. That low CYA could be indicative, however, of just how little chlorine you have actually applied to your pool.

    Regardless, after you Read "The ABC's of Pool Water Chemistry", you should the read "SLAM - Shock Level And Maintain" in the How To section and then prepare to SLAM the pool.

    You will have to gain a better understanding of the parameters involved (especially chlorine) and you will have to follow the SLAM process to clear your pool. Thousands of us here on the forum keep our pools crystal clear following the methods TFP teaches.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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