WATER - My favourite medicine

[Gnosis5]

Isn't there a type of iodine that also purifies water?

Originally Posted by thedarke

All this is great, but my questions of concern are:
1. If you don't have an energy supply to run an electrical filter, what is your back-up.
2. If you are in the middle of no where and by a polluted stream, how do you filter/clean the water for human consumptions. Is there a machine or does anyone know of one or how to inexpensively make one.
I see a lot of people buying these large water filters, but if you have to get out of dodge quickly, I doubt you are going to be toting around a big water filter, ecspecially if you are only able to escape with maybe a back pack and your own self taught knowledge.
I think we should be discussing how to clean contaminated or lake/river water for true survival, rather then endorsing a big contertop device that will run people a few hundred dollars etc.