Just an observation from the peanut gallery...the whole boiling water (how long / how hot etc.) has been discussed multiple times in various ETS Forum threads over the last several years. A forum search should reveal several threads. Additionally, check out the following:

1. Look in the top right corner of your screen and use the "Where do you want to go on ETS?" menu, then select "Skills & Technique" from the drop down menu. Then click on the "GO" button and scroll down the resulting menu to find "No substitute for water" and click on that link in which Doug mentions that a continuous rolling boil is not needed.

2. Also, do a googlesearch for "SODIS" and you will find an amazing amount of information (150k hits in my check moments ago) on the subject.

This is something that we should all consider when we are in need of water. Hope this helps out.


Regards, Comanche7