I’ve recently come across Ecosphere which is a really creative idea for those who would like to see something different from an aquarium or a terrarium on their desks.
Inside each EcoSphere are active micro-organisms, bright red shrimp and algae, each existing in filtered sea water. Because the EcoSphere is a self-sustaining ecosystem, you never have to feed the life within. Simply provide your EcoSphere with a source of indirect natural or artificial light and enjoy this aesthetic blend of art and science, beauty and balance.
How does it work?
The shrimp produce carbon dioxide by “breathing”; the algae use the carbon dioxide and light to produce oxygen. Algae can only produce oxygen when there’s light. When it is dark, the shrimp and bacteria are consuming the oxygen while none is being made. The EcoSphere would die with too many plants and animals, because they would run out of oxygen at night.