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Inverted soda bottle units
Inverted soda bottle units are an incredibly satisfying
project. Here are five essential tips for teachers on how
to make these units a success.
1. Replace the wick with a mixture
of expanded clay growing medium
and coco fiber. It doesn’t biodegrade like a wick does, and I
have found much better success with the
coconut mix.
2. Do not use small bottles as the failure rate is much
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