Part of a video series on how to build a biosand filter (BSF). Learn step by step how to remove a concrete biosand filter (BSF) from a steel mold. Learn tips to make demolding the filter easier and to prevent damage or cracks.
Part of a video series on how to build a biosand filter (BSF). Learn step by step how to remove a concrete biosand filter (BSF) from a steel mold. Learn tips to make demolding the filter easier and to prevent damage or cracks.
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