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Thread: Secondary filter for iron

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    Secondary filter for iron

    I have a pool I am trying to clear, but it has high iron. Every time I add chlorine, it turns brown. Read on another forum a method of taking a submersible pump and routing the output through poly batting after shocking to filter out oxidized iron. Is this feasible?
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    Re: Secondary filter for iron

    It all depends on the amount of iron you have. If your fill water is heavy with iron, it will just keep coming back.

    Test your fill water and post back with that result.

    Generally, a mechanical filter does not work well with iron but there is always a chance.
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    Mod Squad pooldv's Avatar
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    Re: Secondary filter for iron

    You can stuff some polyfill in your skimmer baskets and see what happens. It definitely won't make it worse!
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    Re: Secondary filter for iron

    The polyfill was the idea, using another pump. At this point the homeowner is chomping at the bit to swim. It is BAD. I know it is the fill water - did a liner up the road (same water association) and had to use a sequestrant in the first 1000 gallons. This pool is fiberglass and has not been emptied in 12 years, filling from the same high iron fill water.

    I will have test results tomorrow.
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    Re: Secondary filter for iron

    A greensand filter might be able to remove some or all of the iron in the fill water for the pool. A reverse osmosis filtering of the pool would work too. Both are on the expensive side of things tho. Iron is one of the most difficult things to remove from water.
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    Re: Secondary filter for iron

    Msu moose, are you from MSU?

    You might consider trying on of these attached to the return...be sure to tell homeowner to get the return fitting as well.

    I haven't used it but I've seen several reports that it helps a good deal. Pro s that home owner could also use it to pre filter a bit on fill ups.
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    Re: Secondary filter for iron

    I've always been tickled by the low-tech use of polyfil and/or plain old paper towels in the skimmer to help collect iron. Low budget and it doesn't add anything to the water. It might not work entirely but it might be worth a try if just to lower it some, right?
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    Re: Secondary filter for iron

    When its oxidized, just about anything can catch some iron.
    But generally in water tech world, filtration below 5 microns removes more.
    Slimebag is 1 mcron, ergo, would capture more.
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    Re: Secondary filter for iron

    So just did a test (regular not metals)
    Free Cl 2.0
    CC < .5
    TA 150
    pH 7.4
    CH 75
    CYA 80

    Iron and copper test arriving via FedEx tomorrow.

    Made a filter. It is working pretty good. Catching some stuff, but I am sure it is not enough.

    I have 5 lbs of citric acid for the brown pool walls, but not being able to SLAM is frustrating.

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    Re: Secondary filter for iron

    Iron between .3 and .5 . Adding metal sequestration

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