The pebble, sand wash, small pebbles and quartz sand filtration effect.
Containers of water to dig a small hole in the bottom plug pipe; a layer of small stones on the bottom of the container, a layer of sand, and then covered with sand, charcoal, towel etc..
In this way, the turbid water can be filtered into clean water, and the sterilized tablet can be used for drinking.
take an empty plastic bottle, cut off the bottom of the bottle with the single hole plug plugged with a catheter, the bottle, the bottle from the bottom to the top layer placed washed loose cotton, gauze, activated carbon (i.e., charcoal), quartz sand, pebbles, get a simple water purifier the. Can also put a layer of quartz sand and activated carbon in the following.
