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

Class 10th Science Term 2, Question - We do not clean ponds or lakes, but an aquarium needs to be cleaned regularly. Why ?

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Students. (Representative Image)

Science Class 10 Term 2, Answer to the question – We do not clean ponds or lakes, but an aquarium needs to be cleaned regularly. Why ?

The answer to the question – _________