Guide Full 'link' | Bottle Biosphere

Place small rocks or pebbles at the bottom to prevent root rot. Filtration (Optional):

Step 4: Add the Substrate

Pour in 2–4 inches of moistened potting mix. Use your spray bottle to mist it lightly as you go. The soil should feel like a wrung-out sponge—damp, not dripping. Use the chopstick to remove air pockets. bottle biosphere guide full

2.2 Substrate (Bottom Layer)

• Base: 1–2 inches of fine gravel or sand (rinsed thoroughly).
• Nutrient layer (optional): Thin layer of organic potting soil (no fertilizers) beneath sand for rooted plants.

For more detailed species lists, springtail culturing guides, and advanced CO₂ balancing, look for the extended online supplement to this guide. Place small rocks or pebbles at the bottom

Option 1: Educational & Aesthetic (Best for Instagram/Facebook)

Headline: 🌿 Create Your Own Self-Sustaining World: The Ultimate Bottle Biosphere Guide 🌿 Base: 1–2 inches of fine gravel or sand