Biosand water filter DIY homemade survival water filter cleans + purifies water
Published on March 13, 2017
Biosand water filter made with sand, gravel and a 2 liter plastic bottle. cleans, purifies water and reduces disease causing micro-organisms. homemade survival water filter is simple to make. easy to build. cost $4.75. makes water safer to drink. good to have in an emergency or for anybody that does not have clean water