09/07/2026
YES, A RIVER NEEDS TO BREATHE: We don't see fish coming to the surface and taking a breath like we do.
But fish still need oxygen. They take dissolved oxygen from the water around them. And that makes oxygen one of the most important ingredients in a healthy aquatic environment.
Moving water helps oxygen enter a river. Plants and algae can contribute oxygen through photosynthesis.
But oxygen is also being used continuously. Fish use it. Other aquatic organisms use it. And tiny microorganisms use oxygen while helping break down organic material.
When too much organic matter enters a waterway, that natural biological activity can consume significant amounts of available oxygen.
Suddenly we begin to see why clear water doesn't necessarily mean healthy water. There's an entire biological world operating beneath the surface.
And some of its most important workers are so small we cannot even see them. Tomorrow, we're going microscopic.
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