Monthly Archives: August 2013

Biological water filtration with sand (why does it work?)

Posted on August 6, 2013 by filter_guy

Biological sand water filtration (slow sand water filtration) works mainly because of living things we can’t see with our eyes. If water flows slowly enough through sand, it can be cleansed by these living microscopic organisms with help from gravity … Continue reading →

Posted in slow sand water filter study and construction | 2 Comments