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Thread: What is the cause of my stain

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    Modawg2k's Avatar
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    What is the cause of my stain

    Hi, when my pool was built 3 years ago, I made the mistake of hiring a general contractor who didn't know what they were doing. They built a water feature with natural rock and immediately upon filling the pool after my interior was set, it stained under the rocks. After my pool was started, I hired a waterfall company to fix the actual water feature. What was it exactly that stained the pool from the rocks? Are rocks suppose to be prepared a certain way before putting water in the pool? I am trying to learn if acid washing is my only option for the staining.

    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    duraleigh's Avatar
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    Re: What is the cause of my stain

    Identifying a stain from a picture is hard. You don't say but I assume you mean the white line just above the water line?? I am pretty sure that is calcium and muriatic is the only way to remove it.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Modawg2k's Avatar
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    Re: What is the cause of my stain

    Thanks but I'm referring to the brown stain below the rock on my interior.
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Re: What is the cause of my stain

    Brown is typically organic staining such as tannin staining from leaves or, and this is what I am suspecting, it is iron. It's only under that one rock and nowhere else? Try scraping a vitamin C tablet on the stain. If it lightens up, it is iron and you may need to treat for that.

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    Re: What is the cause of my stain

    Duraleigh.. The calcium stain is indicative of too much or too little of ??

    Thanks..
    Helen
    Dallas Area, 16,000 gal IG, Easytouch 8 computer, Intelliflo 3HP Variable Speed pool pump, Pentair Smart Pump 4x160, Pentair 3/4 HP Booster Pump, FNS 60 DE 60, Mastertemp 400, Rainbow 320, Dual Timer w/ freeze protection, Intellichor SWG, TF100 Test Kit, POOL FILLED AUG 3, 2012, ORDER YOUR TF100 KIT FROM http://tftestkits.net
    http://www.troublefreepool.com/under...ie-t49936.html

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    Re: What is the cause of my stain

    Quote Originally Posted by imrodee
    Duraleigh.. The calcium stain is indicative of too much or too little of ??

    Thanks..
    Calcium deposits itself on surfaces when there is an excess of it.

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    Re: What is the cause of my stain

    Thanks! I'll hunt around here to see how to get rid of it... AND how to not get it back. I'm sure it's in the PS section..

    Thanks again neighbor!
    Helen
    Dallas Area, 16,000 gal IG, Easytouch 8 computer, Intelliflo 3HP Variable Speed pool pump, Pentair Smart Pump 4x160, Pentair 3/4 HP Booster Pump, FNS 60 DE 60, Mastertemp 400, Rainbow 320, Dual Timer w/ freeze protection, Intellichor SWG, TF100 Test Kit, POOL FILLED AUG 3, 2012, ORDER YOUR TF100 KIT FROM http://tftestkits.net
    http://www.troublefreepool.com/under...ie-t49936.html

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    Re: What is the cause of my stain

    Quote Originally Posted by imrodee
    Thanks! I'll hunt around here to see how to get rid of it... AND how to not get it back. I'm sure it's in the PS section..

    Thanks again neighbor!
    This can help... pool-school/calcium_scaling

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    Re: What is the cause of my stain

    TU!
    Helen
    Dallas Area, 16,000 gal IG, Easytouch 8 computer, Intelliflo 3HP Variable Speed pool pump, Pentair Smart Pump 4x160, Pentair 3/4 HP Booster Pump, FNS 60 DE 60, Mastertemp 400, Rainbow 320, Dual Timer w/ freeze protection, Intellichor SWG, TF100 Test Kit, POOL FILLED AUG 3, 2012, ORDER YOUR TF100 KIT FROM http://tftestkits.net
    http://www.troublefreepool.com/under...ie-t49936.html

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    Modawg2k's Avatar
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    Re: What is the cause of my stain

    The stain is under a few rocks. All happened same time
    ~15k gallons, 3'-5'-4' Figure 8 Shape In Ground
    Wetedge Satin Matrix Interior (Pebble)
    Paramount In-floor System
    Pentair IntelliFlo VS 3050, Pentair Triton II TR100 Sand Filter
    Pentair Intellichlor IC40 SWG

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    Butterfly's Avatar
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    Re: What is the cause of my stain

    Try scraping a vitamin C tablet on the stain. If it lightens up, it is iron and you may need to treat for that.
    ditto. And if it lightens, you could crush some cheap Vitiman C tabs in a sock and rub it on the stains.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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