From: robin_listas@es.invalid   
      
   On 2025-12-27 23:04, Carlos E.R. wrote:   
   > On 2025-12-27 21:24, rbowman wrote:   
   >> On Sat, 27 Dec 2025 14:46:50 +0100, Carlos E.R. wrote:   
   >>   
   >>> Ah. No, not familiar with this. To treat water I have always used   
   >>> bleach.   
   >>   
   >> https://backcountryfoodie.com/backpacking-water-purification-beyond-   
   >> filters/   
   >>   
   >> Bleach is inconvenient when hiking but there are several chlorine based   
   >> products.   
   >   
   > Why inconvenient?   
   > I have a tiny bottle, originally eye drops, that closes very safely. I   
   > keep it in the food box.   
      
   I just read that link, and about bleach it says it is not effective   
   against "cryptosporidium". No idea what that is.   
      
   https://en.wikipedia.org/wiki/Cryptosporidium   
      
   Cryptosporidium is highly resistant to chlorine disinfection;[16] but   
   with high enough concentrations and contact time, Cryptosporidium   
   inactivation will occur with chlorine dioxide and ozone treatment. In   
   general, the required levels of chlorine preclude the use of chlorine   
   disinfection as a reliable method to control Cryptosporidium in drinking   
   water. Ultraviolet light treatment at relatively low doses will   
   inactivate Cryptosporidium.[17][18]   
      
      
   --   
   Cheers, Carlos.   
   ES🇪🇸, EU🇪🇺;   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)