: Small organisms (such as snails or aquatic fish) that eat producers or other organic matter. Decomposers
Add labeled compounds and track movement through the system Bottle Biosphere Guide
Activated charcoal is non-negotiable for closed bottle biospheres. It: : Small organisms (such as snails or aquatic
Wash the jar with hot water and a drop of bleach. Rinse thoroughly. Do not use soap—residue kills organisms. Bottle Biosphere Guide
Add 2–3 cm of pond sediment or fine gravel mixed with 1 tsp activated charcoal.
Pour a 1-to-2-inch layer of pebbles or leca into the bottom of the clean bottle. Step 2: Add Charcoal and the Barrier
Tiny crustaceans (like pill bugs) can be added to larger containers to help break down larger fallen leaves. Step-by-Step Assembly Instructions