A bottle biosphere is a perfect demonstration of Earth's natural cycles on a micro-scale.
A truly closed biosphere requires no feeding and no water changes. However, you must monitor it.
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Microorganisms and fungi break down dead plant matter, converting it into rich nutrients. The plant roots then absorb these nutrients to grow new foliage. Essential Materials and Tools
Water is never lost from a sealed biosphere. It just changes state. If you see heavy condensation on the glass in the morning, that is normal. If you see it constantly, you have too much water. A bottle biosphere is a perfect demonstration of
: Microorganisms in the soil break down dead organic matter, returning vital nutrients to the ecosystem. Building a Terrestrial Biosphere
: Sphagnum moss or a mesh screen keeps the soil from falling into the drainage layer. Substrate This public link is valid for 7 days
Select small, slow-growing plants that thrive in high humidity and indirect light: The Biosphere Bottle - Thicket of Diversity
Avoid fish in sealed bottles — they require more oxygen and produce too much waste.
To function as a closed loop, your biosphere needs specific layers to manage water and nutrients: