Question

our filter did not work in the way we thought because we thought the water would be clearer. to make our filter better we would put less charcoal and add more stableness. we think real water filters use more layers so the water can get as clean as possible. i learned what?

Explanation:

The writer learned about the in - effectiveness of their water filter, and insights on improving it such as reducing charcoal and adding more stability, and the importance of multiple layers in real water filters for better water purification.

Answer:

The writer learned about water - filter design and improvement, including the role of charcoal, stability, and multiple layers in water purification.