Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


Ponds and lakes are natural ecosystems. They have decomposers or natural cleaners to decompose the wastes of all aquatic organisms. So it  is not necessary to clean it.
But aquariums are man made ecosystems. They dont have decomposers or natural cleaners. So it should be cleaned regularly....
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts