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- ...water can be reduced by the use of a sand filter. see [[How to Lower Water Turbidity with a Roughing Filter]] Discussion of experiment on deep pipe and clay pot irrigation.17 KB (2,620 words) - 18:52, 23 April 2010
- Roofwater harvesting discussion forum<br />http://www.jiscmail.ac.uk/lists/rwh.html *[[How to Lower Water Turbidity with a Roughing Filter]]44 KB (6,956 words) - 15:56, 27 January 2010
