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Thread: Metal Stains or Scaling?

  1. Back To Top    #1

    Join Date
    Jun 2012
    Location
    DFW, TX
    Posts
    25

    Metal Stains or Scaling?

    Hello TFP members,

    Recently Iíve been noticing what looks like metal stains getting bigger on my pool floors. I canít tell if it is calcium scaling or some type of metal stain. It is very strange thing because when I look at the bottom of the pool when it is sunny outside, it looks absolutely perfect. I cannot see any stains. When it is cloudy or starting to get dark, I can clearly see the stains. Iíd say it covers roughly half to three quarters of the surface. It seems to be getting worse, too. Anyone have any idea on what it could be? Itís a yellowish type stain and has a lot of coverage (meaning, it is not spotty). It does not come off by scrubbing. I can try to post some pics if I can catch it in the right light (hard to do here with the blazing TX sun).

    In February, I tried to do an ascorbic acid treatment (thinking it was a metal stain). It did not work at all. It says to put the filter on circulate. What does that mean? When I went to clean my filter (cartridge), I noticed a lot of heavy white stuff in there. Almost like wet toothpaste. It took me forever to clean. Iím wondering if I need to take out the filter cartridge when doing the ascorbic treatment.

    Appreciate any insight you all may have.
    Thanks,
    Mike
    22,000 gallon - cartridge filter - IG plaster (rock waterfall) - Pentair IntelliFlo VF Variable Flow High Performance 3HP Pool Pump - 16A 230V

  2. Back To Top    #2

    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: Metal Stains or Scaling?

    It sounds like you have calcium scaling. Can you post some test results?

  3. Back To Top    #3

    Join Date
    Jun 2012
    Location
    DFW, TX
    Posts
    25

    Re: Metal Stains or Scaling?

    Flower Mound. Nice, I'm in FM as well. I will post some when I get home tonight. Over the past six months, I've been trying to make sure my CSI is within range. I did notice my pH creeping up during that time frame. Will post later this evening. Thanks.
    22,000 gallon - cartridge filter - IG plaster (rock waterfall) - Pentair IntelliFlo VF Variable Flow High Performance 3HP Pool Pump - 16A 230V

  4. Back To Top    #4

    Join Date
    Jun 2012
    Location
    DFW, TX
    Posts
    25

    Re: Metal Stains or Scaling?

    Here is my latest reading:

    FC: 2
    CC: 0
    pH: 7.2
    TA: 120
    CH: 320
    CYA: 50
    Temp: 85

    Let me know your thoughts.

    Thanks,
    Mike
    22,000 gallon - cartridge filter - IG plaster (rock waterfall) - Pentair IntelliFlo VF Variable Flow High Performance 3HP Pool Pump - 16A 230V

  5. Back To Top    #5

    Join Date
    Jun 2012
    Location
    DFW, TX
    Posts
    25

    Re: Metal Stains or Scaling?

    Could my issues be related to the CH #? Doesn't seem too bad.
    22,000 gallon - cartridge filter - IG plaster (rock waterfall) - Pentair IntelliFlo VF Variable Flow High Performance 3HP Pool Pump - 16A 230V

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