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Thread: Opening Pool, Scaling on Walls=Discouraged!

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    Opening Pool, Scaling on Walls=Discouraged!

    I was optimistic things would go well in opening my pool this year. I am in the shock process and I have been brushing the sides of the pool. There is some very bad whitish scaling all down the walls of the pool (bad enough to cause scratches and scrapes on swimmers). Scrubbing with a vinyl brush does next to nothing.

    I have never had this problem before. How can I get rid of it? How can I prevent it from happening again? Please help.
    25,000 gallon
    AG
    Sand
    filter size is 26 diameter
    flow rate 70 GPM
    AG Pool (33ft.) was newly installed in spring 2011
    location: NE OK

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    Smykowski's Avatar
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    Re: Opening Pool, Scaling on Walls=Discouraged!

    Can you post your latest set of test results?
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Re: Opening Pool, Scaling on Walls=Discouraged!

    FC-11.5
    CC.5
    TA-90-100 (Not sure always how to read this...at pink it's 90...darker pink/red 100)
    CH-180 (it was 200 yesterday.....)
    PH-7.3
    CA-30

    Why the terrible scaling on the walls and what do I do?
    25,000 gallon
    AG
    Sand
    filter size is 26 diameter
    flow rate 70 GPM
    AG Pool (33ft.) was newly installed in spring 2011
    location: NE OK

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    Re: Opening Pool, Scaling on Walls=Discouraged!

    Those numbers don't indicate a calcium scaling condition. Did you have to bring your pH up when you opened this year?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Opening Pool, Scaling on Walls=Discouraged!

    No, PH has been in the 7.3-7.4 range since before I started the shock process.
    25,000 gallon
    AG
    Sand
    filter size is 26 diameter
    flow rate 70 GPM
    AG Pool (33ft.) was newly installed in spring 2011
    location: NE OK

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    Re: Opening Pool, Scaling on Walls=Discouraged!

    Pretty unlikely that calcium scale occurred if your pH was 7.3 or so all winter. Do you have a pic?.....that may not be scale.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Opening Pool, Scaling on Walls=Discouraged!

    Here is a photo. It's some rough nasty stuff! Let me know if I didn't post the photo right.
    Attached Files Attached Files
    25,000 gallon
    AG
    Sand
    filter size is 26 diameter
    flow rate 70 GPM
    AG Pool (33ft.) was newly installed in spring 2011
    location: NE OK

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    Re: Opening Pool, Scaling on Walls=Discouraged!

    Can someone tell me if it looks like calcium scaling and what to do? (Or is my pic not viewable?). I haven't received any advice on what to do. Any help is so apprecited!!!
    25,000 gallon
    AG
    Sand
    filter size is 26 diameter
    flow rate 70 GPM
    AG Pool (33ft.) was newly installed in spring 2011
    location: NE OK

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    Re: Opening Pool, Scaling on Walls=Discouraged!

    Can you post the pic not in a zip? I can't unzip from my iPhone.
    TFP Moderator Chris V. ~16K Pool & Spa, 48NSF DE, IG Plaster Circa 2000, Intermatic PE653, Challenger pump with a 2 speed B2984, 20gal stenner chlorine injection, Houston, TX
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    Re: Opening Pool, Scaling on Walls=Discouraged!

    Can't see the pic.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Richard320's Avatar
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    Re: Opening Pool, Scaling on Walls=Discouraged!

    I opened the picture, but I'm not sure what I'm supposed to be seeing. You might try taking the picture with the pump off and no direct sunlight so the glare doesn't mess things off. Early in the morning works best for me, before the sun has hit the pool.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Re: Opening Pool, Scaling on Walls=Discouraged!

    Here's another photo. All that white stuff. It's caked onto the liner. Feels like gritty sand.
    Attached Images Attached Images
    25,000 gallon
    AG
    Sand
    filter size is 26 diameter
    flow rate 70 GPM
    AG Pool (33ft.) was newly installed in spring 2011
    location: NE OK

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    Re: Opening Pool, Scaling on Walls=Discouraged!

    It's pretty difficult to tell from that photo but calcium scale seems very likely.

    It would be pretty impossible for scale to form with your current results so, at some point, your chemistry must have been w-a-a-a-y out of whack for an extended period.

    If it was my pool, I would lower the pH to 7.0 and keep it there for what may end up being several weeks. Hopefully, the scale will start to dissolve. I can think of no quick fix.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Opening Pool, Scaling on Walls=Discouraged!

    Sorry, my pic turned itself sideways. I turned the filter off and took the pic this morning before the sun was on the pool. There is like a defined rim around the pool then an area where it's not so bad and then a whole lot down the sides. My water level is several inches above the first build-up. I got as close as I could get without getting my phone wet. My husband thinks it's calcium too. I am not sure why it happened because I followed the guide to closing my pool on here last fall....

    What about the products the pool stores have for calcium? I have seen some good reviews on them and they seem to work in several weeks.

    Could someone explain to me what causes calcium scale in pools so that I am educated and can hopefully prevent this from happening again as I am not sure why given my test results I have a problem to start with?
    25,000 gallon
    AG
    Sand
    filter size is 26 diameter
    flow rate 70 GPM
    AG Pool (33ft.) was newly installed in spring 2011
    location: NE OK

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    Re: Opening Pool, Scaling on Walls=Discouraged!

    I am dropping my PH again to 7 to hopefully help with the scaling on the walls. My water is looking much better, we are getting close. I just have the issues with the scaling on the wall.

    My CH started out at 200, 8 days ago when I started the shock process to open my pool. My CH is now down to 160.

    We have had a lot of rain in NE OK the past week. I have had to empty quite a bit of water out of my pool. My stabilizer is also now down to 20. Is it ok to leave it there for now or should I raise it a little?
    FC-6 (still shocking, bringing it up to 12)
    CC-.5
    TC-6.5
    TA-100
    CH-160
    PH-7.3 (going to lower)
    CA-20
    25,000 gallon
    AG
    Sand
    filter size is 26 diameter
    flow rate 70 GPM
    AG Pool (33ft.) was newly installed in spring 2011
    location: NE OK

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