Question

We generally do not clean ponds or lake .But theaquariumneeded tobecleanef frequently.Why?

Answer 1

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 facilityExplanation: