Question

we do not clean natural pond and lake but an aquarium need to be cleaned regularly why

Answer 1

Ponds donot needed to be cleaned but aquarium needs to be cleaned. This is because aquarium do not contain soil and decomposing bacteria which helps in degrading complex organic substance into simple inorganic substance and act as a cleaner . But pond have this facility. Therefore, it do not needed to be cleaned whereas ponds do.

Answer 2

Ponds donot needed to be cleaned but aquarium needs to be cleaned. This is because aquarium do not contain soil and decomposing bacteria which helps in degrading complex organic substance into simple inorganic substance and act as a cleaner . But pond have this facility. Therefore, it do not needed to be cleaned whereas ponds do.