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Thread: The dreaded cloudy pool returns

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    The dreaded cloudy pool returns

    Need some advice on this one...

    Around 6/22-6/26 we had some torrential rains that came on just as my pool was in need of a shock. It wasn't unsalvageable, so I shocked it heavy, but the rain beat me out and raised the PH level in the pool so that it went green on me. I've been dumping about $210 worth of chemicals into it since. I believe that i've solved one problem and created another worse one:

    Here is the pool chemistry history:

    6/27
    FC - 0ppm
    TC - .19ppm
    CC - .19ppm
    pH - over 8.6
    Hardness - 263ppm
    Alk - 47ppm
    CYA - 1ppm
    Copper - .1ppm
    Iron - .1ppm

    Added 2.5 qt muriatic acid, then 30 lbs of alkalinity increaser (ph stabilizer), then 5 lbs of shock

    6/30
    FC - .32ppm
    TC - 2.96ppm
    CC - 2.64ppm
    pH - 6.9
    Hardness - 215ppm
    Alk - 103ppm
    CYA - 24ppm
    Copper - .2ppm
    Iron - .2ppm

    Added 2lbs of pH UP, then 10 lbs of shock

    7/6
    FC - 9.17ppm
    TC - 11.06ppm
    CC - 1.89ppm
    pH - 6.4
    Hardness - 89ppm
    Alk - 93ppm
    CYA - 129ppm
    Copper - .2ppm
    Iron - .2ppm

    Added 2.5 pH UP, then 41 lbs of calcium hardness increaser in 15 doses.

    What I believe I have done here is brought the chlorine level of my pool up to the right level, but the CYA level has gone too high and now I am faced with having a cloudy pool or drain and refill.

    Is there any chance my CYA level will come back down? I don't understand how it got that high.... my pool has a history of getting a high CYA level and then I have to drain and refill. I've had to do this 2 times about 4 years ago, then gave up and just paid a pool guy to balance the pool. This year I tried to save some bucks and think ... welll... ooops i did it again. Am I 'efffed?

    Jake
    30000 gallons, inground, plaster.
    2ft diameter 300lb Hayward Pro Sand Filter S2442 model
    TF-100 Test Kit
    1 1/2 HP Hayward Super II pump model: C48L2N134B1
    Standard Polaris pool vaccum
    Hayward variflo valve
    mesh cover over the winter
    Northern Virginia

  2. Back To Top    #2

    Re: The dreaded cloudy pool returns

    One quick note - those readings were from the pool store. I seem to remember that the CYA test is somewhat unreliable and I have bought the TF-100 test kit off this site the last time I had a CYA problem. I just used the TF-100 kit to test the CYA level myself. It seem to be about 70ppm today 7/7.
    30000 gallons, inground, plaster.
    2ft diameter 300lb Hayward Pro Sand Filter S2442 model
    TF-100 Test Kit
    1 1/2 HP Hayward Super II pump model: C48L2N134B1
    Standard Polaris pool vaccum
    Hayward variflo valve
    mesh cover over the winter
    Northern Virginia

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    Mod Squad pooldv's Avatar
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    Re: The dreaded cloudy pool returns

    Use the TF100 to test everything and give us those numbers. Pool store test results are unreliable. The reason pools get cloudy and algae grows is insufficient chlorine for the CYA level. Chlorine level is set based on CYA and the Chlorine CYA Chart. Chlorine should always be kept at target or a little higher and never allowed to drop below minimum or algae will grow and the will be unsanitary.

    PH should be kept between 7.2 and 7.8

    Pool School - Recommended Levels
    Pool School - Recommended Pool Chemicals
    Pool School - PoolMath
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Re: The dreaded cloudy pool returns

    It's interesting that your CYA jumped up so much when it doesn't look like you added any. Do you still have the container of "shock" that you added and can you tell us exactly what chemical was in it? If it was dichlor that would explain the jump in CYA. The best chemical to use to add chlorine, as pooldv's link says, is "liquid chlorine" from the pool store or household bleach, both of which should only contain sodium hypochlorite. It's important to realize that other forms of chlorine for shocking may be counterproductive because they change other levels too.

    Of course, these test numbers may be wrong and a TF100 would be more accurate as others have said.
    18x36, 19k gal, IG Vinyl, Hayward s244t sand filter, 3/4HP Hayward pump

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    Re: The dreaded cloudy pool returns

    Jake, welcome back... You have the right test kit, now lets get you using it and keep using it... do all the tests and post back and we will get this.. where in the world are you, so we can have better advice... get to the store and get bleach/liquid chlorine, you will need to SLAM to get your pool clear but we need the tests first..
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

  6. Back To Top    #6

    Re: The dreaded cloudy pool returns

    I already started the draining process this morning and I am well underway. It had to be done. Either fight the pool for the next 2 weeks and maybe still lose or drain and refill in 3-4 days. Its hot outside. Its time for the pool to be back on for the fam.

    For informations sake, the shock I treated with with was Anthony Sylvan's Super Pool Treat. Described like this:

    The Anthony & Sylvan Super Pool Treat (Granular) is a quick dissolving stabilized chlorine. With 99.5% Sodium Dichloro-S-Triazinetrione Dihdrate, it contains 55% available stabilized chlorine. This white, granular, fast dissolving chlorine compound will not cloud your pool water and can be used for chlorination as well as super chlorination. This special formulated powder can be used in any pool or spa and it comes in 5 conveniently sized containers (40 lb, 25 lb, 15 lb, 5 lb and 2 lb).

    I told the pool guy I was wary of any chemical that would raise my CYA as i've had this occur two (now three) times since owning the pool circa Feb. 2008.

    All 25lbs purchased were used at two separate administrations. The first brought the chlorine level up, but it fell enough to require the second application.
    30000 gallons, inground, plaster.
    2ft diameter 300lb Hayward Pro Sand Filter S2442 model
    TF-100 Test Kit
    1 1/2 HP Hayward Super II pump model: C48L2N134B1
    Standard Polaris pool vaccum
    Hayward variflo valve
    mesh cover over the winter
    Northern Virginia

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    Re: The dreaded cloudy pool returns

    Read pool school again, and the updated SLAM process. Your pool will be good in no time if you follow the process.
    26' X 52" Intex Ultra Frame. Intex Sand Filter
    26' X 52 Intex Ultra Frame Install
    You can lead a horse to (clear) water, but you can't force him to swim in it!

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    Mod Squad pooldv's Avatar
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    Re: The dreaded cloudy pool returns

    50lbs of dichlor will put 101 ppm of CYA in 30k pool.

    Good plan, definitely need to be swimming in the pool with the fam!
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  9. Back To Top    #9

    Re: The dreaded cloudy pool returns

    It was 15 lbs, then the remaining 10 from a 25lb bucket. 50 was not added.
    30000 gallons, inground, plaster.
    2ft diameter 300lb Hayward Pro Sand Filter S2442 model
    TF-100 Test Kit
    1 1/2 HP Hayward Super II pump model: C48L2N134B1
    Standard Polaris pool vaccum
    Hayward variflo valve
    mesh cover over the winter
    Northern Virginia

  10. Back To Top    #10
    swoopman's Avatar
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    Re: The dreaded cloudy pool returns

    I hope you have found and use Pool Math, but in case you haven't:
    http://www.troublefreepool.com/calc.html

    At the bottom of the page is a handy tool : Effects of adding chemicals

    With a 30,000 gallon pool it says that 400 oz (25 lb x 16 oz = 400 oz) of dichlor (Anthony & Sylvan Super Pool Treat) will raise FC by 55, raise cya by 50, lower pH by 2.11

    Once you've done your drain and fill to get your cya to a manageable level follow the SLAM procedures using liquid chlorine only so you don't keep raising your cya level.
    TF-100 Test Kit
    22,000 gallon, 20x40 kidney-shape IG plaster pool built in 1986
    Nautilus NS-36 DE filter, Hayward Self Prime Super Pump 1HP
    Polaris Automatic Pool Cleaner, PB4-60 3/4 HP pump

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