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<DIV><FONT face=Arial size=2>For those wanting to avoid chemicals, but still
concerned about viruses...</FONT></DIV>
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<DIV><FONT face=Arial size=2>Note that the concentrations recommended for both
iodine and chlorine are based on killing protozoa and bacteria. The needed to
kill viruses is generally only one-tenth of the recommended dosage. (This is why
the PUR purifier worked with just a tiny bit of iodine, since the filter takes
care of the others.) You could carry a tiny supply of iodine or chlorine for
those occasions you might want virus purification (e.g. sources contaminated by
livestock), and use it in tandem with filtering to knock out the viruses.
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<DIV><FONT face=Arial size=2>Steady PCT04</FONT></DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=armchairhiker@gmail.com
href="">armchair hiker - gmail</A> </DIV>
<DIV><B>Sent:</B> Thursday, January 10, 2008 9:24 PM</DIV>
<DIV><B>To:</B> <A title=pct-l@backcountry.net
href="mailto:pct-l@backcountry.net">pct-l@backcountry.net</A> </DIV>
<DIV><B>Subject:</B> Re: [pct-l] polar pure</DIV></DIV></DIV>
<DIV><BR></DIV>You might look at Sawyer filters.<BR><BR><A
href="http://www.sawyer.com/biological.htm">http://www.sawyer.com/biological.htm</A><BR><BR>Biological
Filtration: removes 7 log (99.99999%) of all bacteria like<BR>salmonella,
cholera, and E. coli. And 6 log (99.9999%) of all Protozoa such<BR>as Giardia
and Cryptosporidium. You will find these removal rates to equal<BR>or exceed
competitive options. EPA guidelines allow ten times more Protozoa<BR>left in the
water than we allow.<BR><BR>Get the SP120 inline filter. Weighs 1 or 2 oz
dry.<BR><BR>No chemicals. You can back flush it in the field or at a
faucet.<BR><BR>Something to consider,<BR><BR>- armchair<BR><BR>PS. The Purifier
version is much bigger but removes viruses. I would suggest<BR>the inline
filter.<BR><BR><BR><BR></BODY></HTML>