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Thread: Higher iron/metals content? Update: Pics post MM

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    Higher iron/metals content? Update: Pics post MM

    Can well water suddenly develop a higher than usual amount of iron or other metals? We filled our pool from our well in 2009 and have always topped it off from our well and never had a problem. Just wondering if it's possible for it to change? Thanks.
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    Mod Squad zea3's Avatar
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    Re: Higher iron/metals content?

    Some folks have reported some fluctuation in the mineral content of their wells, but not any big swings that I am aware of. Is this a general "should I watch for this" question or is this "I think I have metals in the pool and I don't know where they came from" type question?
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    Re: Higher iron/metals content?

    The latter. I have been shocking my pool for 3+ weeks now and it was truly a swamp. My FC finally held overnight and CC's are 0, so I'm wondering if it's not clearing because of metals. The water is translucent, just has a tint to it. I have a thread in Pool Start-ups and Closings that's been going since day 1, but I was just wondering speciffically about the metals, so I posted this here. I have had a few responses on there that said it could be metals, so that's why I was questioning it. Thanks.
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    Re: Higher iron/metals content?

    Clear transparent water that is tinted green or yellow while FC levels are high is nearly always metals in the water. Try adding a startup dose of sequestrant.
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    Re: Higher iron/metals content?

    Do I need to let FC drop before adding?
    24' Round 52" High AG, Waterway 125 SF Pro Clean 2HP, 2 SPD Cartridge Filter
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    Re: Higher iron/metals content?

    Just looked up the ProTeam website to find Metal Magic near me.....called the pool store to confirm they carry it and have it in stock before driving all that way, never been to this one before. I'm going to have them test for metals while I'm there. They said it could be mustard algae and if it is I have to buy something specific to treat it???? Doesn't shocking do that as long as you do it for mustard algae?


    Anything else I need or just the Metal Magic.....The ProTeam site says something about adding Dry Clarifier also, is that needed?

    Thanks.


    * Edit: What is the max level for metals before treatment is needed, just so I know? Thanks.
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    Re: Higher iron/metals content?

    Here's a pic.
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    Re: Higher iron/metals content?

    Metal levels up to about 0.3 ppm are alright, especially with a vinyl liner (fiberglass is more sensitive to metals).

    Mustard algae can color the water when the FC level is low, but it goes away quickly once you are at shock level. The treatment for mustard algae is chlorine, which I assume you already have. Though really, you don't have any of the symptoms of mustard algae.

    Metal Magic alone is sufficient, though some clarifier might help. Once you add the Metal Magic there is some chance the water will cloud up. Clarifier might help with the cloudiness, but it is very hit or miss. Sometimes it helps a lot, usually it does nothing. The cloudiness, if it occurs, will go away even without clarifier, clarifier would just help it go away more quickly (if it works).
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    Re: Higher iron/metals content?

    Thanks
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    Re: Higher iron/metals content? Update: Test Results

    Pool store said no copper or iron. So, what now? They said they would wait a few more days before doing the sequestrant, just so I wouldn't be wasting money on something I didn't need. Could their tests be wrong? I told them only to run the metal tests, but they did the complete workup. They told me my CH was too high and my TA was too low, but other than that they said everything was good. They did not try to sell me anything.

    Pool Store:
    FC 10
    TC 10
    pH 7.5
    TA 95
    CH 225
    CYA 40
    Total Diss. Solids 400 ????


    My Results: (1 1/2 hrs later before adding more bleach)
    FC 13
    CC 0
    TC 13
    pH 7.8
    TA 130
    CH 70
    CYA 30 (I did raise to 40 last Tuesday night, not sure why it doesn't read. I think I remember reading it can be off by 10 or so?)
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    Re: Higher iron/metals content? Update: Test Results

    It is very common for pool store metal test results to be wrong. Also, when the water is colored the metal is mostly in microscopic crystals, not dissolved in the water, so they don't tend to show up on the test.

    I'm quite confident that adding sequestrant will remove the color. It is also quite possible that the color will go away if you let the FC level come back down to normal and lower the PH just a little.

    The CYA test is basically +-15, so your results essentially agree with the pool store results. They can probably only test FC up to 10, so ignore that difference in results. PH and TA are both off a little, but not by a surprising amount. The only result that is surprisingly different is the CH level, which is very very different. However, CH is not required for an above ground pool, and both of those numbers are low enough to eliminate any risk of calcium scaling, so it hardly matters what the CH level actually is.
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    Re: Higher iron/metals content? Update: Test Results

    The pool store said I will have to let FC drop to 2ppm to use the sequestrant. Is it really ok to let it get that low and if so how long do I leave it that way? Thanks.
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    Re: Higher iron/metals content? Update: Test Results

    ProTeam Metal Magic does not require lowering the FC level. They recommend that the PH be between 7.5 and 7.8, but that is the only limitation on use.
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    Re: Higher iron/metals content? Update: Test Results

    Ok, thanks. I didn't see that anywhere on their website either, just pH like you said.
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    Re: Higher iron/metals content? Update: Test Results

    I just had a thought and it may be stupid, but I'm going to ask anyway. We had storm damage to our house back in April that tore up our roof. Rover brought up a piece of shingle about 2 weeks ago. Several times it has also brought up the little granules from the shingles. They are Architect shingles, don't know if that makes any difference? Could that possibly have something to do with the metal content, seeing that we've never had an issue before now?
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    Re: Higher iron/metals content? Update: Test Results

    Shingles shouldn't contain very much metal, but roofing nails are made of metal.
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    Re: Higher iron/metals content? Update: Test Results

    Ok, wasn't sure what all was in there besides asphalt, fiberglass and minerals. Haven't seen any nails.
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    Re: Higher iron/metals content? Update: Pics post MM

    Here's a pic from this morning.

    Definately had to be metals......
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    Re: Higher iron/metals content? Update: Pics post MM

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