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Thread: Before and after iron stain removal

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    stev32k's Avatar
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    Before and after iron stain removal

    Just thought I'd show what my pool looked like before and after treatment with Ascorbic acid treatment. The results are pretty amazing to me. Here are the before pictures.
    Attached Images Attached Images
    20' x 40' IG with vinyl liner volume approx. 35,000 gal.1.5 H.P. main pump, Polaris 280 cleaner W/ 3/4 H.P. booster pump
    Hayward sand filter, 3.14 sq ft, 62 gpm. Stenner 45 MPH10 chlorine feed pump. 1 micron final filter bags (home made and very effective)

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    stev32k's Avatar
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    Re: Before and after iron stain removal

    Here are the after pictures
    Attached Images Attached Images
    20' x 40' IG with vinyl liner volume approx. 35,000 gal.1.5 H.P. main pump, Polaris 280 cleaner W/ 3/4 H.P. booster pump
    Hayward sand filter, 3.14 sq ft, 62 gpm. Stenner 45 MPH10 chlorine feed pump. 1 micron final filter bags (home made and very effective)

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    JasonLion's Avatar
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    Re: Before and after iron stain removal

    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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    elwood58's Avatar
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    Re: Before and after iron stain removal

    Amazing results. I have a feeling a bunch of folks are going to tackle this treatment now.
    19204 Gallon L Shape with a 10X10 2nd Step Baja Ledge. Intellichlor IC-40, IntellipH, Cartridge Filter, Pentair Heater/Chiller (Heat Pump). Tons of Deck with Deck Jets. Construction Complete 6/5/17.

    "If you don't measure it, you can't manage it!"

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    stev32k's Avatar
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    Re: Before and after iron stain removal

    I read though the write up on doing the acid cleaning and one thing it said was that the filter should be in recirculate mode to bypass the filter while cleaning. It said that flowing though the filter could cause problems. So I followed instructions and put the filter in recirc mode. However, I also wanted to rid the filter of any iron that could get back to the pool. So my solution was to put the filter in backwash and allow it to flow until the backwash water was completely clear. Then with the pump running and the filter in backwash I added 1/4 cup of AA to the skimmer, counted to 10 and shut the pump off. After 1 hour I just jogged the pump by turning it on for 2 seconds then off again. After 2 hours I repeated the jogging. At three hours I turned the pump on and watched the backwash water coming out. It was clear for several seconds then turned tea colored, then blood red. It ran blood red for several seconds, then tea colored, then cleared up.

    That was an eye opener for me so I repeated the whole sequence. The second time I didn't see any discolored water after soaking the filter for three hours.
    20' x 40' IG with vinyl liner volume approx. 35,000 gal.1.5 H.P. main pump, Polaris 280 cleaner W/ 3/4 H.P. booster pump
    Hayward sand filter, 3.14 sq ft, 62 gpm. Stenner 45 MPH10 chlorine feed pump. 1 micron final filter bags (home made and very effective)

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    todd.scallions's Avatar
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    Re: Before and after iron stain removal

    Man, it should look A LOT better than those after pics you posted. I can still see stains all over the deep end in your after shot. How much AA did you use?
    1.) 27,000 gallons
    2.) Sand Filter
    3.) In-ground
    4.) Vinyl Liner
    5.) 1HP/63GPM

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    stev32k's Avatar
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    Re: Before and after iron stain removal

    Quote Originally Posted by todd.scallions
    Man, it should look A LOT better than those after pics you posted. I can still see stains all over the deep end in your after shot. How much AA did you use?
    Yeah, I see the lines in the corners. They show up in the picture more than in person. I could have used more AA or let the water circulate longer, but I got excited at how clean the pool looked. The pool did not look clear blue before the treatment. It was kind of off blue with a yellow cast. When the AA hit it started turning a clear blue almost immediately and in hindsight I should have allowed it to work longer. I'll try to do better next time.

    I looked at it again this morning and the lines in the corners do not show up unless I put on polarized sun glasses. The picture was taken with a polarized filter on the lens so they show up pretty good.
    20' x 40' IG with vinyl liner volume approx. 35,000 gal.1.5 H.P. main pump, Polaris 280 cleaner W/ 3/4 H.P. booster pump
    Hayward sand filter, 3.14 sq ft, 62 gpm. Stenner 45 MPH10 chlorine feed pump. 1 micron final filter bags (home made and very effective)

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