eli5: Why is water clear in small amount but blue in large amount like an ocean?

Question

I thought it might be the reflection from the sky but if that was the case, why does the ocean appears more blue the deeper you go?

In: 2918

Answer 1

Think of it like, small amount of water have few water molecules layers that’s why it doesn’t reflect blue much on the other hand ocean have large amount of layers that
help to reflect recognizable blue color.