The Self Sustaining Ecosphere (4 Inch).

"A self-contained, self-supporting ecological system is permanentlyu000Du000Asealed within this hand-blown borsilica glass sphere. Its carefulu000Du000Abalance of air, water, plant and animal life was developed as theu000Du000Aresult of years of NASA research into self-sustaining, bio-regenerativeu000Du000Asystems where the equilibrium must be maintained for long periods ofu000Du000Atime, such as long-term space stations. Inside, tiny shrimp feed onu000Du000Abacteria that metabolize organic waste into nutrients for the algaeu000Du000Awhich, in turn, photosynthesize the oxygen needed for the shrimp andu000Du000Abacteria to survive. The life span of the shrimp is up to three yearsu000Du000Aand that of the algae and bacteria is indefinite. 4"" diameter.u000Du000AAvailable only in the Continental U.S. Premium or Express delivery isu000Du000Anot available for this item."

This product is manufactured by Ecosphere Associates Ltd. Buy it onilne now from Hammacher Schlemmer.