Bottle Biosphere | Guide

A thin layer of activated charcoal. This absorbs toxins, filters the water, and prevents foul odors.

: Sphagnum moss or a mesh screen keeps the soil from falling into the drainage layer. Substrate Bottle Biosphere Guide

While the ethos of the "Ecojar" community is often "dump and pray" (collecting local pond water and hoping for the best), the science of a long-lasting biosphere is surprisingly precise. A successful bottle biosphere is not just a jar of water; it is a chemistry set. A thin layer of activated charcoal

Place in (direct sun overheats). A north- or east-facing window is ideal. filters the water