A sterile, lightweight potting soil mixed with perlite or orchid bark. Avoid standard garden soil, which packs too tightly and harbors harmful pests. 3. The Cleanup Crew (Optional but Recommended)
Small gravel, pebbles, or leca (lightweight expanded clay aggregate). This prevents water from pooling around the roots.
Add your springtails. These tiny white arthropods are invisible to the naked eye but essential. You can also add one or two dwarf white isopods. Do not add regular pill bugs—they will eat your plants. Bottle Biosphere Guide
Creates a reservoir for excess water so plant roots do not rot.
Wash the inside of your glass jar thoroughly with hot water. Avoid using harsh chemical soaps, as any residue can poison your plants once the system is sealed. Let it air dry completely. Step 2: Create the Drainage and Charcoal Layers A sterile, lightweight potting soil mixed with perlite
. Direct sun can turn the bottle into a "greenhouse oven," killing the inhabitants. Monitoring:
Nothing goes in or out except light and heat. The Cleanup Crew (Optional but Recommended) Small gravel,
A: No. Spiders need flying prey. Earthworms eat too much and die. Stick to springtails and isopods.