EcoSphere Closed Ecosystem

A company still in business after over 10 years. I have owned one of these globes for 8 years. I still have 1 shrimp left alive of the original 8 or so after all this time. It is a totally sealed unit. The shrimp eat the algae which produces oxygen from photosynthesis of light. Bacteria and waste from the shrimp produce carbon dioxide and the algae, No feeding needed, ever!