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MSR Miox
Gear Review

MSR Miox


Page Type: Gear Review

Object Title: MSR Miox

Manufacturer: MSR

Your Opinion: 
 - 7 Votes


Page By: thebeave7

Created/Edited: May 28, 2004 / May 28, 2004

Object ID: 1080

Hits: 3938 


With the MIOX™ purifier, you can treat suspect water, making it microbiologically safe for drinking using salt, water and an electrical current.

* Proprietary patented technology creates a small batch of an oxidant solution which is mixed with your water to destroy microorganisms

* MIOX uses a chemical reaction called electrolysis to create a powerful disinfectant that will destroy biological contaminants in your water

* More effective against microorganisms than chlorine or iodine

* Destroys viruses and bacteria in 15 minutes, giardia in 30 minutes and cryptosporidia in 4 hours

* Features a safety indicator so you can be sure your treated water is safe to drink

* Comes with 1 ounce of salt to treat 200+ liters of water; 2 lithium CR123 batteries; 50 test strips; instruction book; reference card; storage bag

* MIOX is compact, rugged and submersible

* Purifies water without iodine; no health risk or unpleasant iodine taste

This purifier works by creating a powerful dose of mixed oxidants (MIOX), which is then added to untreated water, inactivating all viruses, bacteria, Giardia and Cryptosporidium (which even iodine doesn't kill). And since the MIOX Purifier needs only common camera batteries and salt to operate, it's maintenance-free, delivering more water, more easily than any purifier ever before. Made in USA.



Viewing: 1-7 of 7

Ed FUntitled Review

Voted 5/5

Compared to water filters, this thing is a leap forward. It's the size of a sharpie marker, so the weight and size are worth it alone. It's very easy to use, and eliminates the issues with pumps and filters.

If you are looking to replace or upgrade a pump or filter, get this now. You won't be disappointed.
Posted Jun 12, 2005 12:46 pm

nebbenNotta too bad

Voted 5/5

Once you get the hang of it, it is a piece of cake, pretty fast, and it has done well for me. Very lightweight, and it treats even cloudy water. No filters, just batteries and salt.
Posted Jan 20, 2007 5:56 am

TecovaVery small

Voted 5/5

I got it because it was very small. It does a bang up job of treating water, and there is no taste that I can discern. The only problem is that you have to wait a little while if you want to well and truly kill everything like Cryptosporidium. This isn't a big deal though. If you treat all your Nalgenes / Camelbaks before bed, you're golden for the morning, and as you finish one off during the day, refill and treat it and by the time you get to it again it's ready to go.
Posted Mar 24, 2007 7:41 am

KevinCraigMIOX sucks (sometimes)

Voted 2/5

When I first got it, it worked like a charm and I used it quite a bit. The most intensive test was a 2 week trip in Canada where we used it to purfy water for up to 8-10 people. It pretty much worked flawlessly and gave pretty good battery life.

Then came last year. My first overnight outing in 2006 was to the Maroon Bells to climb the Bell Cord. I arrived early to get a camp site and decided to purify a bunch of water for the group. I had a terrible time getting the MIOX to work - it would repeatedly give me a "low salt" indication on the LED's. I thought maybe the battery was low (though the battery LED didn't say so) so I replaced the battery. Not much change. I'd have to re-fill or shake the unit multiple times to get one batch of treatment fluid. Plus it burned through batteries MUCH faster than in the past. I think we ended up using Aqua Mira or someone else's Hiker filter for the rest of the trip.

I came home and tested the unit in the kitchen with pretty much the same problems. I called MSR who said I could send it in and they'd look at it, but we were leaving for Peru in about 2 weeks. I reserached on the web and found that water retention in the upper, salt chamber was a known problem. Supposedly, newer models had fixed this problem so, since we had little time before our trip, I just went out and bought what I assumed to be a newer model.

Long story short, I had pretty much the same problem throughout the Peru trip and eventually went to using the filter and/or Aqua Mira for the rest of the trip.

The websites had also related a procedure for making sure that all the water drains out of the salt compartment into the treatment cell, but it's a huge PITA and didn't work consistently either. Most alarmingly, several times the unit would appear to work (i.e. no warning LED's) but from experience I knew that it hadn't run NEARLY long enough to properly oxidize the brine solution (1 - 2 seconds vs. 20 - 30 seconds).

SOOO... right now I'm not sure what to say. I'd had more than enough tent nights for the year by the time we got back from Peru, so didn't have an occasion to try it again once we got back.

Bottom line is that it worked flawlessly for me for over a year (including many weeks of twice-daily use), then pretty much stopped working altogether (i.e. it "works" but is almost impossible to get it to properly complete even one treatment cycle). A replacement unit had pretty much the same problem.

My current guess is that it has major problems when it's even a tiny bit cold outside. I was so disgusted with the unit by the time we got back, that I haven't even bothered to do any more research or get back in touch with MSR. I will probably do some more research here shortly and/or contact MSR.
Posted Mar 24, 2007 3:35 pm

MeruNo value added

Voted 1/5

I have played with this water treatment unit and I take no issue with comments about the functionality of it in producing a disinfectant for water. However it is really doing nothing other than that (a treatment process that can be easily duplicated with iodine or chlorine with much less weight and dependence on batteries and salt). It does not filter the water at all so in especially turbid water the floating particles provide a safe haven for pathogens to hide from the disinfectant. If you don’t intend to filter your water I would suggest saving time and money and bringing a few tablets along. If you want to truly reduce the turbidity (and increased risk of pathogens associated) I would suggest using a true filter. This technology was originally produced for the military to disinfect large volumes of water at once and I believe MSR is simply trying to “create” a market for it in the outdoor community.
Posted Jul 13, 2007 3:07 am

MoapaPkRe: No value added

Hasn't voted

typically, iodine tabs or halazone or hypochlorite will NOT kill cryptosporidium. The MIOX oxidants will. You can buy ClO2 tablets for about $13 per 30 quarts; it's up to you to determine if that is a better deal.
Posted Dec 26, 2007 11:49 pm

Augie MedinaMixed Feelings

Voted 3/5

I got the Miox as a Xmas gift and was later shocked to learn how much it costs. Cost is a big disadvantage. Plus, it takes a while to get used to using it what with having to shake it, using the activation button to indicate the volume of water you are treating and using the test strips and making sure the strips turn the right color. I noted that the instruction manual lists FOURTEEN essentials steps for treating water with this filter. Big bucks and a multitude of steps to use the device properly is not my idea of an enticing piece of outdoor gear.

Its one advantage is size. The unit is not much bigger than a magic marker, although you also have the salt and a tube of test strips to go along with it.
Posted Aug 30, 2007 2:42 pm

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