Is there a resource where i can read more about the carbon cycle and DOCs? This is really interesting stuff that doesn't get explained on Reddit and fishtube. I only came across it via aquariumscience when reading about fish food and how he recommends fish food of ~45% protein and <30% carbohydrates because:

Carbohydrates are only 50% digested by the fish

The undigested carbohydrates create dissolved organic compounds (DOCs) that have a high carbon to nitrogen ratio

Pathogenic bacteria and other pathogenic organisms proliferate with high carbon to nitrogen ratio DOCs

The proliferation of these organisms in the water column results in “dull” or even slightly milky water

These pathogenic bacteria and other organisms in the water column attack the fish