Hello,
From the work I did with my fellow PCV Levi Self in fall 2010 I have made a manual to instruct others on building a biosand filter without the use of a steel mold. If you are someone who doesn't have access to the materials to make a steel mold then we have found a successful way to make a mold from wood. If you have any questions let me know by leaving a comment or emailing me at calebandrachel@gmail.com.
Here is the link: http://www.mediafire.com/?5bualdxyjy5tbtc
Hope this works for you,
Caleb
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