Bottle Biosphere Guide Full Link

: Add a thin layer of charcoal over the pebbles to keep the environment fresh.

Add a small amount of water (do not over-saturate) and seal the lid tightly. The moisture will evaporate, condense on the glass, and "rain" back down, sustaining the plants for years without being opened. bottle biosphere guide full

Choose plants and organisms that thrive in high-humidity, low-light environments. : Add a thin layer of charcoal over

: A 3–5 cm base of small rocks, pebbles, or horticultural grit. This prevents water from pooling at the bottom and rotting the plant roots. condense on the glass

: Mosses, ferns, Fittonia (nerve plants), and Pilea are excellent choices. They stay relatively small and love moisture.