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It’s all about the silica. Silica is water soluble; hence, once you get it into your body it easily absorbed via the intestinal wall and is also rapidly excreted. It does not accumulate in the body, so consistent daily supplementation is important.
Homemade Water Filter & Water Purifier / Berkey Water Filter. This is Really cool and easy to make. This is the easiest and cheapest way to have pure water during an emergency. The buckets are cheap or free and you can get the purification elements and the spigot on this website for fairly cheap. They say it is pure water for less than .02 per gallon. I like it a lot!