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#34270 - 11/16/04 07:11 PM Thoughts on Puritabs
brian Offline
Veteran

Registered: 07/28/04
Posts: 1468
Loc: Texas
I am looking for some educated/experienced opinions on Puritabs. Before anyone attempts the suggestion let me preface this with the fact I can not use iodine for medical reasons so lets not even go there. So far, to date, I have been using MP-1 tabs with great success, however recent events have required that I find something that packs down smaller than MP-1 tabs. From what I understand (please correct me if I'm wrong) puritabs are very very tiny (about the size of those little nitro pills that people with heart trouble carry with them) and still treat one liter of water per tab. My questions are these. How well do they work? What will they (or wont they) kill? Why are they banned in the USA? What is the down side of using Puritabs? I assume there must be a down side or we'd all be using them instead of AP and MP-1 tabs....right? If someone knows of an article on this or any other website which I missed that would answer these questions, please feel free to simply point me to it instead of hasseling yourself with a lengthy explanation. Thanks guys (and girls)!!
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#34271 - 11/16/04 08:10 PM Re: Thoughts on Puritabs
GoatRider Offline
Old Hand

Registered: 08/28/04
Posts: 818
Loc: Maple Grove, MN
I dunno about puritabs, but I've heard you can get MP1's to pack better if you crush the tablet inside the pack.

I would think being banned in the US would be a significant downside, and a significant indication that there are others.
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#34272 - 11/16/04 09:10 PM Re: Thoughts on Puritabs
MartinFocazio Offline

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Registered: 01/21/03
Posts: 2148
Loc: Bucks County PA

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#34273 - 11/16/04 09:31 PM Re: Thoughts on Puritabs
brian Offline
Veteran

Registered: 07/28/04
Posts: 1468
Loc: Texas
That's great information on the MP-1 tabs but Im referring to Puritabs and/or Aquatabs which are quite different (I'm told). I use the MP-1 tabs often and they're great but I need something much much smaller for certain specific situations and I read somewhere that the Puritabs and Aquatabs were the size of nitro pills.
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#34274 - 11/16/04 09:52 PM Re: Thoughts on Puritabs
Tjin Online   content
Pooh-Bah

Registered: 04/08/02
Posts: 1697
if i remeber correctly doug had posted a link of a place where the sold puritabs or aquaclear tabs a long time back... And yes these tabs are tiny, very tiny. i don't know what the sizes are of nitro pills, so can't compair them. But the they are really small. Can't really compair them to iodine tabs, iodine tabs are banned here... Bit opposit of the US, so can't see a "significant indication". Proberbly determent by how much the companys wants to invest in testing and the will of the goverment. I do have to say that i find european law much strikter, wenn it comes down to the safety of it's citizens.
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#34275 - 11/17/04 11:31 AM Re: Thoughts on Puritabs
stargazer Offline
Enthusiast

Registered: 03/05/02
Posts: 224
Loc: Idaho, USA
Brian:

I cannot say for sure why exactly the Puritabs product was banned in the US, but I understand it may be due to the tablets effervescent action, which may produce chlorine gas! You can find some information about Puritabs at this link I have read where there is a controversy about Puritabs killing cysts and therefore it is recommended to use a carbon-based filter.

If you had the time and resources to do so, I noticed the enclosed link above mentions boiling the water as one of the best methods of water treatment. I have heard if you are camping and (in a non-urgent survival situation) wish to have the water for later then try this method.

For each Gallon of Water:

1. Boil the water for 5 minutes. Boiling this long does compensate for higher altitudes.
2. Let stand for 2 hours minimum up to 8 hours in direct sunlight. Use a glass container for this.
3. If water is really cloudy sift through a cheesecloth or similar material before boiling.
4. You can also add 4 drops per liter of sodium hypochlorite (e.g. Clorox) or a total of 16 drops minimum. Add the drops after removing the water from the heat source. Letting the water stand in the sun helps remove the "chlorine" taste.

There is another alternative product called Chlor-Floc and is marketed under the name of Watermaker. This is the current US Army issue water treatment system. Again, the army recommends using a filter. I hope this helps.

Take care,

Stargazer
"If we believe in absurdities, we shall commit atrocities - Voltaire"

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#34276 - 11/17/04 02:34 PM Re: Thoughts on Puritabs
brian Offline
Veteran

Registered: 07/28/04
Posts: 1468
Loc: Texas
Doug has links to the mfr sites for aquatabs and puritabs but I didnt find any links to vendors (yet). Thanks for the info... I'll keep digging.
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#34277 - 11/17/04 02:46 PM Re: Thoughts on Puritabs
brian Offline
Veteran

Registered: 07/28/04
Posts: 1468
Loc: Texas
There's all kinds of good info on that link about more than just chemical water purification. I found the entire page quite interesting and informative. Thanks for sharing it. No doubt that boiling is the best method. I always prefer to boil water instead of ingesting a bunch of chemicals whenever possible. If I I could boil a pint of water in a 1'sq piece of foil in 15min (or heck even 30min) that would solve a ton of problems for me. Unfortunatly my foil-water boiling skills (or lack of skills) leave much to be desired. I cant get water to boil in foil.... heavy duty reynolds wrap, if youre curious. I also can't carry anything larger in certain situations either, which is why I'm not packing up 30 MP-1 tabs, my trusty Bota bottle filter and a 16oz tin cup. <img src="/images/graemlins/smile.gif" alt="" /> Believe me if I could, I would (and I do when space and weight limits permit) pack all of the above and the problem would be solved with redundancy. This may be highjacking my own thread (...LOL the irony...) but if anyone wants to explain the finer points of successfully boiling water in foil, you have my undivided attention.
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#34278 - 11/17/04 05:45 PM Re: Thoughts on Puritabs
Doug_Ritter Offline

Pooh-Bah

Registered: 01/28/01
Posts: 1944
Brian,

First, let me say that the chlorine products are all far better than nothing. However, virtually all the chlorine products have the same drawbacks. 1. They are very dependent upon both water temperature and organic content. Lower water temp and higher organic content both can seriously impact the ability of the chlorine to kill the bad bugs. You can, to a degree, overcome lower water temps by longer treatment or higher concentrations of chlorine. Chlor-Flock attempts to overcome the issue of organic content, and works to a degree. 2. They will not reliably kill Crypto and some other similar hard cysts.

The Puritab and Aqua Tab tablets are very small.

Due to quirks in U.S. law, such treatments are considered pesticides. U.S. approval requires expensive and very demanding testing to prove efficacy. To date they have not successfully completed the testing. Lots of promises over the years, talked to all the manufacturers, but no success to date, to best of my knowledge.
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#34279 - 11/17/04 07:40 PM Re: Thoughts on Puritabs
brian Offline
Veteran

Registered: 07/28/04
Posts: 1468
Loc: Texas
Thanks for the information Doug, that clears up a lot!
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