December 13, 2012

An Ancient Filtration Material Removes Pesticides from Drinking Water

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1 Comment

  1. Kamalakar P says:

    Nice article. Very helpful. Could you please tell us how often should we change the saNd , gravel and charcoal. If one uses about 100 liters of water a day. and could u please let us know the final tds Value of the end filtered water. Thank you.

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