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Slow Sand filter construction

Update October 22, 2013: This filter is still working after 2 years of continuous operation. The filter has been monitored regularly, and as a result,  a potential issue with the sand has been discovered. The bottom layer is too coarse, … Continue reading

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DIY 5 gallon slow sand filter (experiment)

Update April 12, 2014: The 5 gallon filters have been running all this month, and most of last month (March 2014). So far, the best output is filter 10b. It uses .15 mm effective size sand and a very, very … Continue reading

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