March 25, 2017 from 11am to 3pm – Blaine Pavilion - NWEP Emergency Preparedness Expo Let's talk about Slow Sand Water Filters. I have basic knowledge of how they work and I am in process building my first one. They produce very clean water at about 10 gallons per day. The supply of r… Organized by David Culver for the Slow Sand Filter discussion | Type: discussion
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