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MSR Miox Purifier
Miox Purifier

Do these pump-free water purifiers work?

What’s your take on the MSR Miox pump-free purifier? It has been the subject of some debate, and I’d like your insight. Chris Helena, Montana

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MSR Miox Purifier

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I think it聮s a great gadget. The MSR Miox ($130; www.msrcorp.com) is a brilliantly clever little device that uses salt and an electrical charge to create an extremely powerful germ- and virus-killer. You mix some untreated water with a dose of the salt, let the Miox charge that mixture with electricity, then add the result to your drinking water. Within 30 minutes it kills nearly all bacteria, protozoa such as Giardia, and viruses (cryptosporidia take longer to kill, about four hours).

MSR Miox Purifier

MSR Miox Purifier Miox Purifier

As a bonus, the Miox is much smaller than a filter聴about the size of a large whiteboard marker聴and can treat water for an entire party.

There are a few minor downsides. It doesn聮t filter water, so you聮ll still have some grit, dead Giardia, and any aftertastes already in the water (the Miox solution itself is tasteless). It聮s not a 聯drink now” method, so you can聮t find a cool stream, filter a quart of water, and have a sociable drink. And it聮s electrical, so there聮s always the chance of a problem there, although its CR123 batteries last for some 200 recharges.

I wouldn聮t necessarily say the Miox is perfect for everyone, but it sure is an excellent alternative to bulky filters (none of which remove viruses, anyway, so still require extra water treatment in many parts of the world).

Check out this year聮s more than 400 must-have gear items, including , in the 2006 Buyer聮s Guide.

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