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Making filter for water purification

You need:

  • plastic bottle,
  • sand,
  • very fine sand,
  • charcoal
  • cotton wool

 

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Instructions:

Cut the bottom of the plastic bottle, turn it and fill it up: first place in the cotton wool, then crushed charcoal, very fine sand and sand last. Place it over the water tank. In the bottle with sand put dirty water. Observe the outgoing water.

 

 

 

 

  

 

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