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Thread: Iron Filter

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    Question Iron Filter

    I am using well water and have Very, Very high Iron. While I have the water cleared up, it is staining the side walls. GLB Stain magnet works great, as does Muriatic acid, or rubbing with Vitamin tablets, but I keep having to apply it.
    While one of the Chemistry articles here say to only solution is to drain and refill with 'good' water I really don't have that option.

    I recently saw an U-Tube video on a home made Iron Filter. I have also read numerous articles saying the same method

    Basically they took a 5 gallon bucket, put a fill tube on the bottom and couple of drain holes in the lid. They then filled it with Poly Fill for "stuffing pillows'. The poly fill removed was brown with the iron! No surprise but does this really remove the iron?

    My question is has anybody used this and does it really work? I don't mind running this for a long time to eventually remove it all.

    I have an in-ground, concrete bottom, fiberglass walls about 23,000 gallons.

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    Texas Splash's Avatar
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    Re: Iron Filter

    Hello R2W55! I see you haven't received a reply yet on your post about iron filtering. I just wanted to let you know we haven't forgotten about you. The server problems have impacted several forum replies. This reply should get your posting updated back to the top of the queue where hopefully someone experienced with your specific question can provide some constructive answers. Thanks for checking-in with TFP, and have a great day.

    In the meantime, here are some notes and links I had on this subject:

    Many people have it filtered away in a few days on its own, or resort to the use of a metal sequestrant to help filter it. If it starts to look like coffee, then it requires immediate action. Here are a couple links you may find useful:
    Pool School - Metals in the Water and Metal Stains
    Green water and low ph
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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    Mod Squad Bama Rambler's Avatar
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    Re: Iron Filter

    People have had limited success in raising the FC to shock level and then filtering out the iron. I've seen people use paper towels in the skimmer and even those little "iron filters" on the fill. The polyfil would probably work as well as anything and if you compressed it well the path through it would make pretty good filter media. Even if it didn't remove it all, it may remove enough to help the staining you're seeing.
    Dave J. TFP Moderator
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    Mod Squad zea3's Avatar
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    Re: Iron Filter

    Several members have reported using pillow stuffing like you saw on the youtube video works fairly well at filtering out iron. You may need to change the stuffing frequently until all the iron is filtered out.
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    Richard320's Avatar
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    Re: Iron Filter

    Welcome!

    Look at pictures in these threads and see if you don't get inspired. If you do, do what they did.
    A Tale of Two Filters... and Ugly, Rusty Water.
    Just got Taylor-2006 Test Kit. Want to verify what I should add.
    Results of first TF-100 test ran on fill water - Page 2

    Let the pH and FC stay on the high end and grab as much precipitate as you can, and then add a metal sequestrant to deal with the leftovers.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Re: Iron Filter

    R2W...for the "pillow stuffing bucket" to work, the iron has to be oxidized, meaning your water will have yellow to briwn tint. That happens when people shock (it oxidizes iron) and/or don't keep sequestrant levels maintained.

    You said your water is clear but staining, which means you've sequestered the metal, but possibly not enough or possibly higher ph is causing it to stain...controlling for metal stains works best at around a ph of 7.2...higher and you wil start to see stains.

    So, your choices are either to deliberately oxidize the iron in order to try to reduce it (which may also increase staining), THEN treat for staining using Ascorbic Acid treatment, OR to more heavily sequester, and try to reduce your iron over time when you makeup water. The problem with that plan will be that your makeup water is full of iron.

    Last year I tried a mega dose of metal magic (5 qts) per the sponge test....in my pool, it both sequestered the iron AND removed staining. See ths thread about that approach, whereby RavenJim discovered the metal magic sponge test and describes what he did: Switching Sequestrate from EDTA to HEDP

    In addition, I've also run a softened water spigot for makeup water, which has now (after a few years) reduced my iron content to about .3 ppm

    You could use the bucket idea to filter you're makeup water, btw...any kind of filtering of the raw water will help.
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    Unhappy Re: Iron Filter

    OK I'm about to pull my hair out!! I have been using stain removers (which remove them) and the adding sequestering agents to filter out. I even put those string filters (used in whole house filters) in the skimmers. those I thought was removing some of it as I had to rinse them off 2-3 times a day.
    I took my water in to tested and Surprise, NO Iron and No Copper!!
    FAV .68
    TC .78
    pH 7.37
    TA 98
    Calcium 231
    Cyanuric Acid 56
    copper 0
    Iron 0
    Phosphates 1750
    Phosphates are high because the Sequestering agents .

    I saw a picture on another site that showed the exact type of staining which the caption said low chlorine levels!!! this I find hard to believe but I have been keeping chlorine low for the sequestering agents to work.

    ANY Ideas?????
    R2W55, Kidney shape/~25K, Gunite/Fiberglass, Sand Filter/Pentair/Tagelus/TA50D/Geobrite media,
    Jacuzzi Pump/Magnum Force, Haywood Heater, Auto Chlorinator, built 1960???, re-plumbed 2004

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    Richard320's Avatar
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    Re: Iron Filter

    The sequestering agents bind to the metals and keep them from reacting with the test reagents, hence you get false readings of no metals.

    If Vitamin C lifted the stains, it's metal.

    Organic stains - generally caused by accumulated leaves and acorns and whatnot over the winter will fade over time with chlorine in the water. Same exact process as using bleach in the wash to brighten your whites.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Iron Filter

    Thanks Richard. I just took a Vitamin C tablet and rubbed on the staining. YEP wiped right off. So the question is still how to get rid of it.. If I have it in solution so that testing doesn't see it and the filter doesn't seem to remove it. I am using Zeo brite media. So just live with it until I lower the water this fall and replace with expensive bought water? Should be about 1/2 the volume.
    I have used my well to fill in the past and Never had this problem before. I did try the 'Metal Trap' this year and am wondering if this might have caused it.
    R2W55, Kidney shape/~25K, Gunite/Fiberglass, Sand Filter/Pentair/Tagelus/TA50D/Geobrite media,
    Jacuzzi Pump/Magnum Force, Haywood Heater, Auto Chlorinator, built 1960???, re-plumbed 2004

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    Re: Iron Filter

    Best way to get rid of iron is aeration. Rig up a fountain that lands in a catch basin large enough to hold 5 min of flow. Then rig a pipe from the surface of the basin back to the pool. The bottom of the basin will fill with iron particles. Bleach will accelerate the process dramatically.

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    Re: Iron Filter

    ^^+1. Adding a small submersible pump directly to the well water to create a fountain effect and mixing accomplishes the same thing; works well in shallow wells with slow throughput.
    14 x 28 Jacuzzi vinyl inground pool, Jacuzzi Laser 250 sand filter, Hayward 1 HP pump.

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    Re: Iron Filter

    I used this method last summer after my water turned brown. I used a cheap 5 gallon storage container with a lid and stuffing from a pillow. You must secure the lid so it doesn't come off from the pressure of the water. I drilled a lot of holes around the top of the container itself, inserted the part of the filter hose that shoots water back to the pool on the bottom of one side and stuffed it full of polyester. I set the container on the pool ladder so the water could spray back into the pool. It took about 5 days (turned off at night) of constant filtering and a lot of rinsing the polyester but it worked like a charm. I'm getting ready to fill my pool back up in a week or so and I'm planning to use this method right off the bat.

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    Re: Iron Filter

    The polyfill and bucket method works great if the iron has turned the water brown. Not sure how good it will work to stop it in the first place. Defiantly going to pay attention to this one to see how it turns out.
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

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    Re: Iron Filter

    I saw on another thread where they had added a small amount of de powder to a sand filter for cloudy water. Would this help to remove some of the metal as well?
    12,500 Gallon fiberglass, chlorine,1 skimmer, 2 returns adjustable eyes, sand filter, automatic chlorinator (don't use except for vacation or if CYA gets low), 1-1/2 hp EcoTech motor on Pentaire Supeflo pump some trees.

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    Re: Iron Filter

    Possibly. As long as it's visible in the water, mechanical methods should work.
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

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    Re: Iron Filter

    If you fill your pool from a well, the chances are really good you may have iron. Mechanical filtration might be a good stop gap but then you refill from that same well and more iron gets in your pool..

    The permanent fix is to get rid of the well water. No amount of mechanical filtering will really fix the problem at all.
    Dave S.
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