Each Sphere is a Completely Sealed Eco Friendly Eco System. It Contains Active Micro Organisms - Red Shrimp & Algae - in a Clear Transparent ‘soup’ of Filtered Sea Water. Simply Provide the Ecosphere with Indirect Natural or Artificial Light & the Ecosystem Will Thrive Without Needing Further Attention. Life Expectancy of Two-to-three Years But It is Not Uncommon for a System to Last Much Longer. Space Age Technology. the Ecosphere is the Result of Technology Developed at Nasa Space Research Laboratories. Animal & Plant Life in Perfect Balance with Nature.