Bottle Biosphere | Guide

Wash the bottle, gravel, and tools with hot soapy water. Rinse thoroughly. Contamination is your enemy.

The Sealed System (The "Ecosphere"):

The Semi-Sealed System (The "Jarrium"):

Place a circle of window screen or a thin layer of dried sphagnum moss over the charcoal. This stops soil from sifting down. Bottle Biosphere Guide

Q: How long will my bottle biosphere last? A: A perfectly balanced system lasts 5 to 20 years. The record is 60 years (David Latimer’s bottle garden).

Q: Can I put a spider or a worm in it? A: No. Spiders need flying prey. Earthworms eat too much and die. Stick to springtails and isopods.

Q: My condensation is gone. Is it dying? A: Possibly. If the glass is bone dry for two weeks, open it, mist 5 sprays of distilled water, and reseal. Wash the bottle, gravel, and tools with hot soapy water

Q: What is the easiest plant for a first biosphere? A: Taxiphyllum barbieri (Java Moss) or Plagiomnium affine (Many-fruited thyme-moss). These are unkillable.

Avoid: Succulents, cacti, air plants (need airflow), and fast-growing herbs (mint, basil).

There is an ongoing, heated debate within the community regarding the morality of sealing living creatures in a jar. Is it a zen garden, or a prison? The Semi-Sealed System (The "Jarrium"):

Critics argue that without a filter or water changes, animals in jars are destined for a slow death by suffocation or ammonia poisoning. This is often true for ill-prepared jars containing fish (which should never, ever be placed in a sealed jar).

However, proponents argue that for creatures like the Opae ula, the jar is not a prison, but a protected haven. In the wild, these shrimp live in anchialine pools—landlocked bodies of water with subterranean connections to the ocean. These pools often evaporate or become hypersaline. The shrimp are evolved to withstand stagnation that would kill a goldfish in minutes.

"You aren't trapping them," argues one hobbyist forum post. "You are building them a predator-free paradise where they have infinite food and perfect salinity. They live longer in the jars than they do in the wild."

Light energy is captured by autotrophs (plants, algae) via photosynthesis. This energy passes to herbivores and then to decomposers, eventually leaving the system as heat. Because a sealed bottle exchanges negligible matter with the outside, energy input (light) is the primary driver.

The jar is the skin of the universe. For beginners, glass is king. A standard Mason jar works, but the gold standard is a "cookie jar" or a specialized glass vessel with a sealed gasket lid. The key is clarity: you are the observer, and the glass is your window. The vessel must be non-porous; any gas exchange introduces the outside world, destabilizing the internal climate.