Activated carbon Activated carbon takes advantage of its multihole structure on surface to absorb chemicals, organic pollution source, color and smell from water. Generally less activated carbon volumn, more surface area. And of course more excellent absorbability when you choose activated carbon as filter media, you should pay much attention to its feature more pressure loss. Superfine coconut shell activated carbon adopted by KOCHIN can be used on different occasion such as drinking water treatment, potable water treatment, aquarium, family or factory use. Acid washed and unwashed coconut shell activated carbon from size 6x12(for large system use) to 20x50 (for family use).