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Thread: FC/CC pink tint

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    AnnaK's Avatar
    Join Date
    Jul 2007
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    Eastern Pennsylvania
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    1,132

    FC/CC pink tint

    Maybe it's the shirt you're wearing?

    A couple of days ago I was testing FC and CC. At what I thought should be the titration endpoint I still had a very slight pink tint in the cylinder. Adding another drop of reagent didn't make it go away and neither did the second and third drop. I know just enough chemistry, and I know my pool, to know that something wasn't right.

    I stepped outside the pool house into bright sun and lo! No pink. Ran the test again, outside this time, and the endpoint came when I thought it should.

    The problem was the coral coloured tank top I had on. Inside the pool house its colour bounced off the white sticker on the chlorine test cylinder and made the test appear to be pink.

    This brought to mind the day I walked on the pool deck and discovered green water. Talk about a heart stopper! There was NO reason for it to be green. Then I noticed that the green wasn't through the pool or in the pool but on the water, like some shimmery, sparkly ethereal layer of green. That one came from the reflection of my birch grove and the angle of the sun. In a few minutes, the green was gone, like magic.

    Heads up. If your test doesn't come out the way it has in the past and if you have a good idea of how it should be, give some thought to the lighting and the environment in which you're reading the test. It may make a difference in your (perceived) results.
    — AnnaK —

    12,000 gal AGP, Hayward sand filter, Pentair 2-speed pump, timer.
    Please visit our Pool Issues pages for information about step weights, managing the solar cover, and PoolSkim.

  2. Back To Top    #2
    frustratedpoolmom's Avatar
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    May 2007
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    SWSuburban Chicago, IL
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    11,963

    Re: FC/CC pink tint

    The other day I swore my daughter had a terrible sunburn....it was my magenta tank reflecting off her skin.....
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

  3. Back To Top    #3

    Join Date
    Mar 2008
    Location
    Central VA
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    328

    Re: FC/CC pink tint

    That's funny!
    And a good point. There are also issues with light spectrum colors inside (fluorescent vs. incandescent, etc.), because we hired a photographer to photograph some product and he explained some of this to us as he set up his own lights. So I guess if you can check the results outdoors with as few reflective colors nearby as possible, that's the way to go...
    Todd
    --------------
    Pool: 16x36, 16,800 gal., vinyl, sand filter, SWG & AquaCal Heat Pump
    Spa: Hot Springs Sovereign, 355 gal., ozone/ion
    The most helpful tool you'll ever have for your pool:
    http://www.poolcalculator.com/

  4. Back To Top    #4

    Join Date
    Oct 2007
    Location
    Valrico, FL
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    500

    Re: FC/CC pink tint

    There are also issues with light spectrum colors inside (fluorescent vs. incandescent, etc.)

    A little off topic but that is why you should never try to color match paint with fluorescent lights!
    7,500 gal, IG pool, L shape 22' x 15', 1.5 hp pump, cartridge filter, AquaPlus SWG/Controller, Pebble-Tec liner.

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