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Thread: Definitive Iron thread

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    astronaut888's Avatar
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    Definitive Iron thread

    Having trouble locating a definitive "iron staining" treatment thread or area on "pool school"
    I have diagnosed the yellow staining on my pool steps as iron and am looking to treat and have found several threads addressing this in a number of different fashions.
    Any guidance to an appropriate thread would be much appreciated.

    FC 7
    CC zero (!)
    CYA 40
    TA 50
    pH 7.2
    Temp ?

    Really hoping that I don't have to get my FC to zero to effectively treat (!)
    Can't really think of how Iron is in my pool to begin with?
    20K gal, IG vinyl, 1 1/2 HP Hayward Super Pump , 100lb sand, installed 2000 - new liner/filter/pump March 2014
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    Richard320's Avatar
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    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Re: Definitive Iron thread



    bless you
    20K gal, IG vinyl, 1 1/2 HP Hayward Super Pump , 100lb sand, installed 2000 - new liner/filter/pump March 2014
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    Re: Definitive Iron thread

    Is the staining only on your steps?

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    Re: Definitive Iron thread

    16622816544_53c9f5fa63.jpg16622817704_46d014d711.jpg17244716181_7272f666cc.jpg


    quick snaps before the sun even was up this morning - yes, pretty much isolated to the steps - a bit on the flat surface of the skimmer but not too bad

    added a pack of "Emergen - C" vit C powder (the little packs for mixing into a glass of water) and it went away almost immediately

    16622822644_ca625459d3.jpg

    So, just from that I'd imagine it is iron yeah?
    20K gal, IG vinyl, 1 1/2 HP Hayward Super Pump , 100lb sand, installed 2000 - new liner/filter/pump March 2014
    TF-100 test kit

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    Re: Definitive Iron thread

    So, just from that I'd imagine it is iron yeah?
    Yep.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: Definitive Iron thread

    I had a similar problem where just the steps and skimmers were affected. Rather than dose my whole pool, I just used the vitamin C tabs in a sock and scrubbed the steps and skimmers clean. Your FC may lower so keep an eye on it if you go this route first.

    Have you had any unusual pH swings lately?

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    Re: Definitive Iron thread

    Quote Originally Posted by MarianParoo View Post
    I had a similar problem where just the steps and skimmers were affected. Rather than dose my whole pool, I just used the vitamin C tabs in a sock and scrubbed the steps and skimmers clean. Your FC may lower so keep an eye on it if you go this route first.

    Have you had any unusual pH swings lately?
    no pH swings that I am aware of

    I keep the pool up and clean all winter here in S Carolina to make easier at the start of the season, however, over the winter I certainly test much more infrequently
    At the start of the season a few weeks ago I hit it w/ a larger dose of bleach upon going out of town for a couple of days b/c the weather temp spiked for a few days - just kind of blindly got some bleach in there to help prevent a bloom -
    Measured and was at like 11 or 12 ppm chlorine w/ a CYA of 40

    Allowed to get back down to the normal range prior to daily adjustments and that took a couple of weeks
    pH was steady around 7.5-7.8 at that time.

    I feel the staining was noticed after hitting with that large bolus of chlorine but really can't remember if it was there prior to that or not

    Have heard that Metal Magic may be the way to go if I am not keen on getting my FC to "zero" - and, I'm certainly not keen on that idea b/c since liner replacement last spring I have had ZERO CC and ZERO concerns w/ algae and CERTAINLY don't want to tempt fate (!)

    Still reading up on the link Richard320 provided - so, may discover that Metal Magic is not the preferred method.

    Pool store told me on phone that they feel that is what I'd be looking for and that it would be it's own sequestrant - I'm not so sure until I do some of my own recon on the issue.
    20K gal, IG vinyl, 1 1/2 HP Hayward Super Pump , 100lb sand, installed 2000 - new liner/filter/pump March 2014
    TF-100 test kit

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    JasonLion's Avatar
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    Re: Definitive Iron thread

    If you have staining just on fiberglass steps, and not elsewhere on the pool, Jack's Magic Step Stuff is quite effective.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Definitive Iron thread

    17257306106_b48003ea63_b.jpg


    One bottle of metal magic (quart)
    added over steps then brushed vigorously
    The top 2 steps cleared up within a couple of hours - then, the next day checked it out and all look great.

    Only used half of the recommended dose (quart per 10,000 gallons) in my 20k gallon pool and seemed to do the trick

    Added when the FC was right at 3 and pH was somewhere above 7.2

    Added in the evening and the next day we saw no sunshine / rained all day - so, waited until the next evening (about 30 hours after application) to take the FC back up to around 6.

    That was 3 days ago.

    We will see how it goes from here.

    Never saw any cloudiness in the water as many had noted in various reviews of the product that I read online.

    Hopefully it stays nice -

    Anyone here suggest a maintenance dosing of metal magic - or, should I just "wait and see"??
    20K gal, IG vinyl, 1 1/2 HP Hayward Super Pump , 100lb sand, installed 2000 - new liner/filter/pump March 2014
    TF-100 test kit

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    Swampwoman's Avatar
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    Re: Definitive Iron thread

    Greetings. I have good luck with Metal Magic too.

    If one dose cleared your steps, then I would try half their recommended "low" monthly dose, eg. Just 3 oz instead of six. Just add more/adjust if stainng comes back.
    In ground extended Grecian, 22,000 gal, Hayward 220t sand filter, vinyl liner, dolphin m4 supreme.
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    Re: Definitive Iron thread

    Greetings. I have good luck with Metal Magic too.

    If one dose cleared your steps, then I would try half their recommended "low" monthly dose, eg. Just 3 oz instead of six. Just add more/adjust if stainng comes back.

    Thanks for the suggestion - will certainly give that a try!
    Going to check online - This was one of those RARE "pool store" visits - didn't have a single one last year after obtaining my CYA early in the season
    Will likely look into ordering product online - as it was pretty expensive at pool place
    20K gal, IG vinyl, 1 1/2 HP Hayward Super Pump , 100lb sand, installed 2000 - new liner/filter/pump March 2014
    TF-100 test kit

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