Why must an aquarium have biodiversity?

Biodiversity in an aquarium is essential for maintaining a balanced ecosystem, as it promotes stability and resilience against diseases and environmental changes. A variety of species can enhance the biological processes, such as nutrient cycling and waste breakdown, ensuring clean water and a healthy environment. Additionally, diverse interactions among species can create a more natural and engaging habitat, benefiting both the aquatic life and the viewer's experience. Overall, biodiversity contributes to the overall health and sustainability of the aquarium ecosystem.