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Thread: ascorbic acid stain removal difficulties

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    ascorbic acid stain removal difficulties

    Has anyone encountered trouble removing iron stains from a vinyl liner with Ascorbic Acid? I fought with the stains last year and spent a ton of money at the pool store to no avail. This year I learned about ascorbic acid and dropped a vitamin C tablet in the pool and was amazed at how quickly it removed the stains we had scrubbed and applied ALOT of metal stain removal products to with no results. So, I got super excited and began my search for AA. Expensive, yes, but it works I thought! Well, I am into over a hundred bucks so far and 6 lbs of AA.... it only removes the stains with direct contact to the liner in my pool. I have been trying to invent an applicator that will utilize the AA on the surface of the liner before it dissolves. Jeez! I am getting frustrated. I know the AA removes the stains but it is a giant pain to apply and costly! Originally I read that just circulating a couple of pounds of AA would lift the stains. It seems such a tease to know I can remove the stains if only....
    Any advice out there? My well water has become super irony these last two years, and that is another issue (is also killing house water softener) but the reason for the new staining I think, our pool is 13 years old and we never had this problem before. Thanks!


    18,000 gal doughboy 28' round. DE Filter, power pak II pump.
    28' round AG with dish out bottom 20,000 gal, doughboy pool (1997) with non-doughboy replacement vinyl liner 2014. Hayward de filter. Andover MN

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    Join Date
    Dec 2009
    Location
    Central Massachusetts
    Posts
    2,677

    Re: ascorbic acid stain removal difficulties

    Did you drop the chlorine levels to near zero before you started?
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

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    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,887

    Re: ascorbic acid stain removal difficulties

    There is a discussion of how to do the AA treatment here. There are several steps that you need to do in the correct order for it to work correctly.
    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: ascorbic acid stain removal difficulties

    Yes I think I followed all protocols, maybe I missed something?. Chlorine O, ph and alkaline right on. The only thing off the charts is how hard the water is, I haven't had to change that before (?) It works as it is directly applied, but not circulating.
    28' round AG with dish out bottom 20,000 gal, doughboy pool (1997) with non-doughboy replacement vinyl liner 2014. Hayward de filter. Andover MN

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