Metal stains - From Ascorbic to Oxalic acid

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wxbean

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Oct 14, 2012
2
Tampa, FL
I have metal staining on the walls. Brought my chlorine level down to zero, PH down to 7.2 and put in 2 lbs of ascorbic acid. Three days later the stains are slightly lighter, but still remain in full force.
I remember using United Chemical 'Pool Stain Treat' a couple years ago. It knocked the metals off the wall very fast. But since it's Oxalic acid I got the clouding for about a week.
Would I potentially do any harm by jumping straight to Oxalic acid right now since the ascorbic acid appears to not be strong enough?
 
Thanks, yep I read the article (very helpful by the way).
That's one of the reasons I'm thinking of jumping to the Oxalic acid is it seems that the ascorbic really didn't do much even after 2 lbs. At this rate it could really cost me a lot of money if I keep going with Ascorbic.
I'm surprised it didn't do much considering how small my pool is?
 
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