In a nutshell, activated carbon is just that, carbon. Zeolite is a broad term for a wide variety of minerals, though most are a lattice of oxygen and silicon atoms. The other specific minerals or metals and their proportions in the lattice are what make the difference kinds. Zeolite does NOT typically contain carbon. Both do adsorb chemicals, and that is why they are used in fishkeeping. Zeolite is much better at adsorbing ammonia than carbon is, though carbon is usually better at adsorbing medications than zeolite.
Never knew that. So Thanks.