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A comment on A sealed bottle garden thriving after 40 years without fresh air or water. Parent comment

Re:A sealed bottle garden thriving after 40 years without fr... by droopyEyelids on Friday June 06, 2014 @11:23AM (#7858411)
Another puzzling factor is the clarity of the glass. When I've seen bottle gardens, they all develop a thick scum from minerals in condensation, algae, and bacterial plaques.
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Re:A sealed bottle garden thriving after 40 years without fr... by bronson on Friday June 06, 2014 @01:44PM (#7859307)
This is a great GREAT point.

It would be nice to hear an explanation.

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Re:A sealed bottle garden thriving after 40 years without fr... by ceejayoz on Friday June 06, 2014 @04:10PM (#7860052)
Magnetic scrubbing brushes. They're commonly used in aquariums.
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