What is an ecosys

Ecosystem is defined as self-contained unit of living and non-living beings. It is made up of biotic as well as non-biotic components. So, the physical and biological world where will live is Ecosystem.

A pond or lake is not required to be cleaned because they have their own natural system to clean them but aquarium is a man-made ecosystem and consists of a very small area or space. Moreover, the abiotic components are supplied by human and are not naturally. So. For survival of living bodies in the aquarium, it is necessary that it should be cleaned regularly.