The sand filter written about here will certainly remove some turbidity from water, but it will not make water safe to drink on it's own. A slow sand filter is very similar http://en.wikipedia.org/wiki/Slow_sand_filter , but develops a biofilm layer to further remove contaminates. —The preceding unsigned comment was added by SmartLikeTruck, 11 May 2011
- Good comment. We need to tie pages like this together with something about sequencing & what makes sufficient treatment. E.g. I recently saw a demonstration of PUR sachets used to treat murky brown water, & it occurred to me that if they'd passed it through a basic filter first, they could use less of the PUR, & end up with less of a chlorine taste in the water. That initial treatment might get the water clear & make the final treatment easier, but it's definitely not enough on its own. --Chriswaterguy 08:53, 11 May 2011 (UTC)