Water filtering

[adam00f]

Do you guys know any natural filters for water..i nned to make one for AP Envriomental science..and google is olny giving my man made filters..

i have a sand and rock concept one

2 lieter bottle some beach sand and rocks and make4 tick layers

[Zachthemac]

I remember when I had to do this for school a couple years back. Take a look at this. It's kind of your idea.

[mith]

Basically, you use the sand/gravel/sieve to filter off the big particulates.

To clear up the water, u might use the cheesecloth or activated charcoal(not found in nature but effective).

If all else fails, manually centrifuge it .