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Thread: Pool balanced still green

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    Pool balanced still green

    Have sand filter run 10 hrs everything is correct
    fac 5ppm
    cya 60
    ta 100
    ph 7.4 pool is about 16000 gallons in ground plaster gets sun allnost allday run pump from 8:15

    it does this every two weeks 3 weeks

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    Mod Squad zea3's Avatar
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    Re: Pool balanced still green

    Hi, welcome to TFP! You will need to complete the shock process to get rid of the algae, then maintain the FC high enough to prevent it from coming back. Read through pool school in the upper right corner of this page for details on hoe to perform the shock process.
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    Re: Pool balanced still green

    Thanks Do u rec any good products

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    techguy's Avatar
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    Re: Pool balanced still green

    Shocking your pool is a process that uses liquid chlorine as the primary tool. You can read about it here POOL SCHOOL-Shock Process
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

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    Mod Squad jblizzle's Avatar
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    Re: Pool balanced still green

    Bleach ... and lots of it ... added to maintain the shock FC level found in Pool School for your CYA level.

    For 60ppm, you need to maintain the FC at 24ppm ... and then when you pass the 3 tests to stop, you have to maintain the FC above 5ppm at all times.

    If your test kit does not measure above 5ppm, then order one of the recommended test kits (see link in my signature) with the FAS-DPD chlorine test. I recommend the TF-100 as it is a better value for the amount of reagents you get.
    Jason, TFP Moderator
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    MikeInNH's Avatar
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    Re: Pool balanced still green

    Quote Originally Posted by Ajl1986d
    Thanks Do u rec any good products
    Bleach. At 60 CYA, shock is holding 25ppm until the 3 criteria are met.
    pool-school/chlorine_cya_chart_shock
    pool-school/shocking_your_pool
    Mike
    2007 1st full year with AG pool~15k gallons 18'x33' JW
    6/2010 added 2 button Intex SWG-painless except for when reset
    Switched to BBB from Baquacil (couldn't pay me to go back)

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    Re: Pool balanced still green

    Welcome to TFP!

    Good advice so far. You really need a good test kit though.

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    Re: Pool balanced still green

    Pool store like 2000 ft away lol I just go there but ok thanks

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    techguy's Avatar
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    Re: Pool balanced still green

    Most here are looking to avoid going to the pool store.

    Good luck.
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

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    MikeInNH's Avatar
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    Re: Pool balanced still green

    Most pool stores sell liquid chlorine. Sometimes they have 12% for a good price.
    Mike
    2007 1st full year with AG pool~15k gallons 18'x33' JW
    6/2010 added 2 button Intex SWG-painless except for when reset
    Switched to BBB from Baquacil (couldn't pay me to go back)

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    Re: Pool balanced still green

    Another possibility is that the sand in the filter might be old, or the water is channeling through and not filtering very effectively. The sand might need changing or needs a good mixing up and complete cleaning. Sometimes adding a small amount of DE or other filter aids will clear up the water after 24 hours of filtering, and should be added after every backwashing. That might solve the problem.

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    Mod Squad Bama Rambler's Avatar
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    Re: Pool balanced still green

    The sand being old is not a possibility, it's a definite. In fact it's millions of years old.

    However it could be channelled or calcified but until you pass the OCLT, I wouldn't concern yourself with worrying about the filter. There's no indication that it's a problem yet.
    Dave J. TFP Moderator
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    Re: Pool balanced still green

    Good point Dave.
    Perhaps I am wrong, but I have always had the belief that sand can be worn down, the edges become smoother, due to a high amount of backwashing and constant water movement. If true, this would make it more difficult to remove dirt, organic matter, and dead algae as effectively as it once did.

    Until yesterday, I haven't followed the posts on clearing up cloudy or green pools (because I have mainly focused on other issues) and I apologize if I am going against TFP policy. But from my perspective of maintaining pools for my customers, if I have maintained a chlorine residual around 10 ppm for a week, and the cloudy water doesn't clear up, I hesitate about adding a very high dose of chlorine. I have often found that by simply adding DE, filter aids, or clarifiers to pools, (and it always seems like the cloudy water problem has been with sand filters, or older cartridges filters), usually works. Of course, I also put my hand in the filter to stir around the sand as best as I can and try to determine the condition of the sand. If it doesn't clear up, then I have super chlorinated to about 30-40 ppm, and yes, then that usually works in those cases.

    Ocassionally, when the pool water just won't clear up, I have brought out a portable DE filter, and within 24 hours, the pool water is clear. Of course, maybe if I had raised the chlorine level to over 50 ppm, then perhaps that would have worked also.

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    Mod Squad Bama Rambler's Avatar
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    Re: Pool balanced still green

    My point was a little in jest. I just didn't want the OP getting distracted from the immediate problem by worring about the filter right now.
    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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