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Thread: Kind of milky, cloudy water

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    Kind of milky, cloudy water

    Hello,

    I've recent swapped from a DE filter, back to my old sand filter last week. When I got everything back going, the water was a blue-greenish color. I dumped 1 1/2 cases of Chlorine in the water, plus 3 bags of the calcium chloride in, and some algaecide. I also vacuumed and brushed the walls of the pool multiple times. The water is now blue, but it has a hazy, kind of milky cloudy look to it. You can barely see the bottom of the shallow end, and not at all in the deep end. I've been backwashing it multiple times a day, as the filter pressure has been going from 10 psi to 19-20. I think I killed all of the algae when I vacuumed and shocked it, but again, I can't see the bottom. Do I just need to let the filter keep working, or is something else going on here?

    FC: 5.0 PPM
    PH 7.4
    Alkalinity: 100 PPM
    CYA: 25 PPM
    20,000 gal oval pool
    Vinyl Liner
    Sta-Rite Sand Filter
    Hayward Pump

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    mas985's Avatar
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    Re: Kind of milky, cloudy water

    When fighting algae, you need to follow the SLAM procedure: Pool School - SLAM - Shock Level And Maintain
    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

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    Re: Kind of milky, cloudy water

    In general, you're right on. Your algae is probably dead, and you simply need to let the filter clean it out. Sand filters can often take around two weeks to complete that process.

    You're running below shock level for your pool though. If you haven't already done a complete shock and observed that your chlorine level doesn't drop more than 1.0 ppm overnight, you should. Shock level on your pool is around 11 based on the chart. http://www.troublefreepool.com/conte...art-slam-shock From what you're describing, the algae appears to be dead, but actually performing the test can provide the security of KNOWING that's it's all gone and that you're just waiting on the pool to clear up. (http://www.troublefreepool.com/conte...loss-test-oclt)
    18k plaster IG pool - cartridge filter - Pentair Superflo VS - Taylor K-2006
    Dolphin Nautilus Robotic pool cleaner

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    Re: Kind of milky, cloudy water

    Ok. I'll bring the shock level back up, and see what I lose overnight! Thanks!
    20,000 gal oval pool
    Vinyl Liner
    Sta-Rite Sand Filter
    Hayward Pump

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    kcindc's Avatar
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    Re: Kind of milky, cloudy water

    Your CYA test result is a little confusing as CYA test results using the drop kit is rounded up to the nearest ten. Pool store test results and test strips are highly inaccurate. Did you get your results from one of the recommended test kits? Pool School - Test Kits Compared

    I hope you didn't dump a lot of chemicals at once in your pool. Blindly dumping in a bunch of chemicals can ruin your liner and equipment. We don't believe in a one time dump, but rather a process of maintaining your FC at SLAM levels Pool School - Chlorine / CYA Chart until you pass the SLAM criteria:
    CC is 0.5 or lower;
    You pass an OCLT (ie overnight FC loss test shows a loss of 1.0 ppm or less);
    And the water is clear.
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

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    Re: Kind of milky, cloudy water

    Quote Originally Posted by kcindc View Post
    Your CYA test result is a little confusing as CYA test results using the drop kit is rounded up to the nearest ten. Pool store test results and test strips are highly inaccurate. Did you get your results from one of the recommended test kits? Pool School - Test Kits Compared

    I hope you didn't dump a lot of chemicals at once in your pool. Blindly dumping in a bunch of chemicals can ruin your liner and equipment. We don't believe in a one time dump, but rather a process of maintaining your FC at SLAM levels Pool School - Chlorine / CYA Chart until you pass the SLAM criteria:
    CC is 0.5 or lower;
    You pass an OCLT (ie overnight FC loss test shows a loss of 1.0 ppm or less);
    And the water is clear.
    I have a Kokomo(sp) kit, and the CA tube has a decent sized gap between the 20 and 30 mark, so I estimated.

    The water is still really cloudy. When I was vacuuming, I'd notice that when I hit certain spots, algae would shoot back out the jets. Now I'm just getting a white powder shooting out. Shouldn't the filter be catching this? The sand I used in my filter is the Quikrete Pool Filter Sand. Anyone had any issues with this? Filter has been backwashed multiple times a day- whenever we see that it has risen to 20PSI. Only thing that I've noticed is that there appears to be a little bit of sand under one of the jets.. I can't see it because the water is too cloudy, but that's what it looks like and sounds like when I hit it with the vacuum. I checked the laterals before adding sand, and backwashed for a few minutes after I changed it... I'm wondering if something is going on at the filter..
    20,000 gal oval pool
    Vinyl Liner
    Sta-Rite Sand Filter
    Hayward Pump

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    Jordy Verrill's Avatar
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    Re: Kind of milky, cloudy water

    How long ago did you put the calcium chloride in? I used a couple pounds of it at once a few weeks ago because I was out of bleach, I had a bunch of it on hand, and my calcium levels in the water aren't very high, and it made my water milky/cloudy for a day and a half.
    16x32, In Ground, ~20,000 gallons, Vinyl
    1hp Hayward Pump, Hayward s200 Sand Filter, Raypack Heater (rarely used)
    Taylor K-2006 test kit

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    Re: Kind of milky, cloudy water

    Quote Originally Posted by Jordy Verrill View Post
    How long ago did you put the calcium chloride in? I used a couple pounds of it at once a few weeks ago because I was out of bleach, I had a bunch of it on hand, and my calcium levels in the water aren't very high, and it made my water milky/cloudy for a day and a half.
    It was on Sunday.
    20,000 gal oval pool
    Vinyl Liner
    Sta-Rite Sand Filter
    Hayward Pump

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    Re: Kind of milky, cloudy water

    So I started putting DE into the filter, and it started coming out of the jets. I took the top of the filter off, and there appears to be a layer of DE on the sand, unless it's something else... Not sure what's going on here...







    20,000 gal oval pool
    Vinyl Liner
    Sta-Rite Sand Filter
    Hayward Pump

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    Mod Squad pooldv's Avatar
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    Re: Kind of milky, cloudy water

    Sounds like it might be time for a Deep Cleaning a Sand Filter
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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: Kind of milky, cloudy water

    Quote Originally Posted by pooldv View Post
    Sounds like it might be time for a Deep Cleaning a Sand Filter
    Even with new sand? I just changed the sand....
    20,000 gal oval pool
    Vinyl Liner
    Sta-Rite Sand Filter
    Hayward Pump

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    kcindc's Avatar
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    Re: Kind of milky, cloudy water

    You might have misaligned one of the laterals in the sand filter. You should definitely inspect the sand filter to make sure nothing is broken or out of place.
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

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    Mod Squad pooldv's Avatar
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    Re: Kind of milky, cloudy water

    No, if it was just taken apart then no deep cleaning is needed. Something is put together wrong.
    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

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