Pour in 2–3 inches of soil. Create "topography" by making one side higher than the other for visual depth.
Do not seal the bottle permanently on day one. It requires a brief "balancing phase." Bottle Biosphere Guide
Add 1–2 inches of pebbles for drainage. This prevents "wet feet" (root rot). Pour in 2–3 inches of soil
No condensation visible at any time of day, and the soil looks light brown. Fix: Add a few sprays of distilled water and reseal. Light and Temperature producing oxygen. Respiration occurs at night
Photosynthesis happens during the day, producing oxygen. Respiration occurs at night, using oxygen and releasing CO2CO sub 2