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How do I make a simple drinking water filter?

My water is not up to the standard, every day with my smelly greenish, live in the same building are to tap water company to reflect many times, but they are nobody. Come on, everybody.


(4) use crushed stones to grind charcoal into powder, and then put 3~5cm thick sand, charcoal, fine sand, charcoal, sand, and so on (about 5 to 7 layers) in turn
(2) subtract the bottom of the empty plastic bottle with scissors, and drill a few small holes on the plastic bottle cap (usually 7 to 10 will be enough);(3) cut the clean gauze into square shape (about 3 to 4 pieces together). The flat pad is in the bottle cap, and it covers the lid tightly;
Method for manufacturing simple drinking water filter:(1) prepare materials: scissors, gauze, fine sand, charcoal, empty plastic bottles, some crushed stones, water containers (cups), ropes.

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