well you take like a coke bottle, cut the bottom piece off and then first put a coffee filter in first. On top of that you put different layers of of material you’d usually find outside. on top of the filter goes sand, then some earth, on top of that gravel, and on top of that pebbles. you basically try to first filter out the big stuff and then the smaller stuff further down.
Dark Child
January 15, 2007 | 2:03 PMwell you take like a coke bottle, cut the bottom piece off and then first put a coffee filter in first. On top of that you put different layers of of material you’d usually find outside. on top of the filter goes sand, then some earth, on top of that gravel, and on top of that pebbles. you basically try to first filter out the big stuff and then the smaller stuff further down.
bouldy789
January 16, 2007 | 4:52 AMin order to make a state of the art purifier u would take screens apon screens till u cant even find the holes so it filters the tiniest of microbes.