. We do not clean ponds or lakes, but an aquarium needs to be cleaned regularly. Explain

Best Answer

A pond   is a self sufficient or independent unit in nature. It contains all the components  of the ecosystem. In this ecosystem, producers (hydrophytes) trap the solar energy and then provide the basic food or energy for all other life in the pond. When the producers and consumers die, the decomposers present in the pond act on their dead bodies to return the various elements back to the nutrient pool On the other hand, in an aquarium there are not any producers and nutrient pool to trap solar energy, therefore the fishes living in an aquarium need to be nourished. Moreover  due   to  absence  of  decomposers   the  excreta  of  the  fishes  cannot  be decomposed.  Therefore the aquarium needs to be cleaned regularly.