Originally Posted By ndsol

The chlorine dioxide tablets are good. Just ensure that they say they can kill all the nasties. If they are good, they will say that a contact time of up to four hours is required.

That four hour time can be more than is needed. It's for dirty, cold water.


Of course, it doesn't say whether clean, warm water should have the 30 minute or 4 hour treatment time to treat cysts....

The wait time is why thru hikers often get the Aqua Mira Frontier Pro - which is NOT suitable to rely on it for anything but filtering the largest critters out - but, cysts are quite large by comparison to bacteria. So a pass through the Frontier Pro followed by 30 minutes with chlorine dioxide does the trick.
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