Improves Water Quality
In general, activated carbon ensures water clarity by limiting impurities in the aquarium water column. Anyone who maintains a fish tank knows that the overall aesthetics of a particular fish tank largely depends on the clarity of the water column. Dirty aquarium water ruins the impression of any fish tank.
Reduces Odors
Every animal produces an "odor", and fish are no exception. It's hard to describe, but as soon as you enter an aquarium room without an aquarium cover, you can smell that natural smell. Activated carbon keeps the water from smelling bad by reducing phenols, the main cause of bad odors. To be honest, activated carbon makes the water smell fresh and neutral.
Limits Algae Growth
Algae do not like activated carbon filtration. It can minimize the growth of algae by absorbing excess nutrients in the water. Activated carbon is an absorbent of organic compounds, so it also helps reduce the appearance of protozoa.
Reduces Pollutants
Activated carbon adsorbs a variety of dissolved organic compounds in tap water, such as chlorine and chloramines. It is also beneficial if you put untreated driftwood in the aquarium. This decoration releases tannins, which are what give the water its brownish color. It may be harmless, but it looks like a dirty rainwater container. Thanks to activated carbon, it's fairly easy to remove the unsightly color. (Many aquariums use tannins intentionally, especially biotope or breeding aquariums)
