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Kishu Binchotan Charcoal | using binchotan are the way Japanese naturally water purify water just by placing the sticks in a glass pitcher. Better than britta filters, I've found...

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This activated charcoal stick filters your water, no plastic and ugly Brita filter needed. Plus it's compostable when you're done!

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from The Survival Mom

INSTANT SURVIVAL TIP: Improvised Water Filter - Survival Mom

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Water Purification Science Project + video. This does NOT purify water but it would be a good idea to get the gunk out before you do...

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Clapp's Home-Made Water Filter. this filter is composed of the simplest materials - sand and charcoal. The filter is arranged from a 50-gallon wine cask with a false bottom, perforated; on this a layer of gravel, then alternate layers of charcoal and white, clean sand, and top layer of excelsior, with perforated cover ten inches from the top, and a discharge-pipe or over-flow four inches from the top.

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