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Thread: Stains and more stains

  1. Back To Top    #1

    Join Date
    Sep 2010
    Central FL

    Stains and more stains

    I've been following and reading for quite some time. I've had issues with algae you've guided me through and now I'm ready to tackle stains. I have 3 different kinds. Two just appeared in the last 3 weeks.

    As I've read through much of your site I'd pretty much concluded I had an iron issue. These only started to appear in the last 6 months and they would lighten and darken. The previous owners used Phos Free regularly in the pool which definitely makes me feel that there was an iron issue.

    (Within the last few weeks the pesticide crews came through and sprayed lawns. I live on a lake and they are treating the lake for various overgrowth issues.)

    Majority of my stains are brownish and are more prominent when my PH is higher. They respond to a vitamin tablet.

    Recently I had these skinny copper and curly looking stains appear on the steps. They look similar to a photo I saw you identified as tannin stains. I don't have any oaks. These stains didn't respond to an over the counter vitamin C.

    The third stain that's appeared in the last couple of weeks is round rust copper looking. This doesn't respond to vitamin C.

    Here are my present levels:

    FC 9
    CC 0
    PH 7.6
    TA 125
    CH 425
    CYA 60

    My borates have been running around 30.

    I had purchased a bottle of Pink Stuff but had not used it yet.


    Plaster Non-SWG

  2. Back To Top    #2
    Aquatica's Avatar
    Join Date
    Jun 2010
    Nassau, Bahamas

    Re: Stains and more stains

    The only thing I've found that really works is muriatic acid. you could drain the pool and acid wash the stains..just spot wash each stain. or there is a peice of equipment that attaches to the pole pole and you can spot acid wash with pool filled but i havent tried it yet. it will reduce your pH level down quite a bit i suspect.

    got to control your pH make sure it doesn't get really high for long periods and also make sure the pool is kept clean. A Pool Cleaning robot will help. oh and stay well away from adding CalHypo that stuff can stain pools! just shock with bleach if you have to.

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