[pct-l] polar pure

[armchair hiker - gmail]

You might look at Sawyer filters.

http://www.sawyer.com/biological.htm

Biological Filtration: removes 7 log (99.99999%) of all bacteria like
salmonella, cholera, and E. coli. And 6 log (99.9999%) of all Protozoa such
as Giardia and Cryptosporidium. You will find these removal rates to equal
or exceed competitive options. EPA guidelines allow ten times more Protozoa
left in the water than we allow.

Get the SP120 inline filter. Weighs 1 or 2 oz dry.

No chemicals. You can back flush it in the field or at a faucet.

Something to consider,

- armchair

PS. The Purifier version is much bigger but removes viruses. I would suggest
the inline filter.