ctivated carbon is made up of tiny pores that are highly absorbent which work to soak up organic and inorganic pollutants in your aquarium water. It excels at removing tannins, chlorine, chloramine, phenols (causes of bad smells), and heavy metals (copper, lead, nickel, etc).
Complete guide to aquarium activated carbon - how it works, types, setup tips, and benefits for crystal-clear tank water.

ctivated carbon is a powerful filtration material that removes impurities and toxins from aquarium water. Its tiny pores enhance its ability to adsorb harmful substances like chlorine and organic compounds, promoting clearer and healthier water for fish.
The general rule of thumb is to use about 1/4 to 1/2 cup of granular activated carbon per 50 gallons of aquarium water. However, always refer to the manufacturers instructions for the specific product you are using.
ctivated carbon has a phenomenal absorption rate but does not last forever. Eventually those tiny pores will have attracted and bound with as much contaminates as it can hold, becoming saturated. Typically activated carbon is effective for one month.