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Subject: TWL: Re: Trawler-world-list digest, Vol 5 #499 - 11 msgs
From: Rick Quarles (rquarles@XXX.XXX)
Date: Sun Nov 03 2002 - 08:12:19 EST
Mel Knott wrote:
"Hi, Rick. They are more likely organic stains. Two sources are red
algae (dinoflagellates) which, when they "bloom", cause the water to
become a dark mahogany color. Another source is blackwater areas that
have a lot of tannins in the water."
In those cases 'Clorox' would remove the stains, bleaching them away and
oxalic acid would do nothing. My observation is that just the opposite
happens: the oxalic acid removes the stain; the 'Clorox' just smells
funny. When you pour 'Clorox' into blackwater (which is what we have
here) it does , indeed, bleach the tannins out.
Rick Quarles
Barric II, Nordic Tug 32-147
New Bern, NC
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