Because the solution is still bright yellow and smells strongly. If you wait long enough it turns clear white again.
Do you lose some strength with time? Definitely. Does it matter......that depends. I rarely use more than half reccomended amt anyway, because water has low contaminant level, and I might be waiting longer too.
Exception is like CT where cow , sheep, and horses are abundant
Last edited by MuddyWaters; 08-22-2017 at 11:19.
+1 for bleach, also +1 for just drinking the water out of the ground
I have 3 bottles of Coghlans water purification tablets that takes 30 minutes to kick in. Much lighter than carrying AM and more convenient. It must be an American product as it has a spiel about Federal Law etc. Some of it is written in French. Having seen no Frenchmen dying on the trail it must be effective. Does anyone else use it, and if not, why not?
I did a quick search and the Coghlans water puritifcation tablets appear to be iodine based. Iodine is not very effective for Giardia or cryptosporidium. Giardia generally doesnt kill a healthy adult but can make for miserable sickness. Cryptospridium is Giardia on steroids it kicks in quicker and the symptoms are far worse.
Many of those tab type treatments loose efficacy after opening. If the package is opened on one trip they recommend throwing them away and buying a new sealed package.
The advantage of AM is to match usage to water conditions, and $. If just going to add rec. amt, use the tabs.....easier.
Scratching around on the internet, someone stated that chlorine dioxide (Aqua Mira) takes up to four hours to kill Cryptospridium.
I have both AM and the tabs. Also have two filters. Not really keen on bringing one or the other, (Sawyer Mini/Straw) hence looking at my options and for wisdom as I don't have a death wish
Last edited by MuddyWaters; 08-22-2017 at 17:18.