Hey! Tell me more about this BioSand Filter

I thought you'd never ask. And even if you didn't I'm going to tell you anyway!

A concrete box about 12" square and 1 Meter high with 3 layers of sand and gravel, a difusion plate and a lid. Designed so it can be easily made virtually any place in the world.

And look what it is touted to do.

I drank from one for the duration of my stay in Brooke's Point.

Click on the pictures to enlarge.
For more information see: Dr. Manz - Inventor, CAWST