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Thread: Brown spots bottom of pool.

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    TitanFlorida's Avatar
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    Exclamation Brown spots bottom of pool.

    Hello TFP,
    I am happy to have someone give me great advice!

    Problem I have is a massive probably 60 or so brown spots on the bottom of my IG pool and some on the steps. I had some old vitamin C tabs so I crushed them and placed it on a brown spot on the step. It didn't change the color.

    A Pool guy said it is the iron bleeding up from the rebar. I won't get into what he told me to do!

    Then someone else should drain the pool and grind out those spots and then put in the new diamond bright? HELP!
    IMG_5489-2.jpg

    I have other photos also
    Mark- From Port St Lucie, FL.
    Built 98, 18K gal, IG, Plaster/Diamond Brite(redone in 2004) , Pro Clean Cartridge Filter Model #PCCF-150, 2qty Sta-Rite 1.5hp Centrifugal Pump, water test strips, Options: large Waterfall, Fiber Optics perimeter and internal lighting; filled we use city water. Screened in Area 2,000 Sq FtWhite Aluminum-Screws are rusting.

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    Mod Squad kimkats's Avatar
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    Re: Brown spots bottom of pool.

    So have you felt them with your fingers? does it feel like there is missing plaster there? any pitting? still smooth?

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    TitanFlorida's Avatar
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    Re: Brown spots bottom of pool.

    Hello Kim,
    Thanks for the reply!! I tried to put Vit C on the spots but it did not lighten them. They don't feel pitted. Should I have posted this somewhere else? I am new to this site.
    Mark- From Port St Lucie, FL.
    Built 98, 18K gal, IG, Plaster/Diamond Brite(redone in 2004) , Pro Clean Cartridge Filter Model #PCCF-150, 2qty Sta-Rite 1.5hp Centrifugal Pump, water test strips, Options: large Waterfall, Fiber Optics perimeter and internal lighting; filled we use city water. Screened in Area 2,000 Sq FtWhite Aluminum-Screws are rusting.

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    Mod Squad kimkats's Avatar
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    Re: Brown spots bottom of pool.

    Your next "test" is to put a chlorine puck on them and let us know what that does. We will go from there.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    borjis's Avatar
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    Re: Brown spots bottom of pool.

    If it's from rebar protruding through or just underneath then it's rust.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

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    Mod Squad kimkats's Avatar
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    Re: Brown spots bottom of pool.

    If it were rust the Vit. C should have done something to it right?????????

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    borjis's Avatar
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    Re: Brown spots bottom of pool.

    I know it would if it was a metal stain...I don't think it would work on Rust but not 100% sure.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

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    wjr75's Avatar
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    Re: Brown spots bottom of pool.

    May be some metal in the stone pebbles. I have a couple in a new pebble sheen finish that I need to address next spring.
    Inground 22k gallon gunite 15x31 main pool, 15x7 wading pool/sunning deck, hot tub/with overflow (9' octagon with limestone top) & slide NSWG, Aqua Blue Pebble Sheen
    Filter dual cartridge Sta-rite 450sq/ft, TF-100 Test Kit
    Heater Raypak 2100 400k btu cupro-nickel exchanger
    Auto pool cover, Polaris 280 auto pool cleaner, Jandy AqualinkRS8 Remote Control System

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    TitanFlorida's Avatar
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    Re: Brown spots bottom of pool.

    Here is what I am thinking!

    1) I need to rework my waterfall and fix some of the leaks were the fiber optic lights are then re-color it with Portland cement and color.
    2) I need to remove the remaining tile grout above the tile which is chipping off. Last time I had the pool refinished the pool guy left a grout line of 3/4"
    3) I found 1/2" Thin tile which I want to put in there then re grout.

    Since I need to drain the pool to do the tile.
    Should I grind out the brown spots and add new diamond Brite?
    Then Acid wash the entire pool with Muriatic Acid (50% MA and 50% Water)?
    Mark- From Port St Lucie, FL.
    Built 98, 18K gal, IG, Plaster/Diamond Brite(redone in 2004) , Pro Clean Cartridge Filter Model #PCCF-150, 2qty Sta-Rite 1.5hp Centrifugal Pump, water test strips, Options: large Waterfall, Fiber Optics perimeter and internal lighting; filled we use city water. Screened in Area 2,000 Sq FtWhite Aluminum-Screws are rusting.

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