Originally Posted By: KenK
Giardia & Cryptosporidium are clearly a problem for those treating water.

Most water filters will screen out bacteria (think e. coli), but won't screen out viruses and the G & S cysts.



Gairdia and Cryptosporidium are larger than 2 micron and thus CAN be filtered out by many filters.
Some iodine resine based purifiers will have questionable results on Gairdia and Cryptosporidium, when they don't have a 2 micron or smaller filer medium. (like granulate based iodineresin/carbon filters/purifiers)


_________________________