'Carbon' - the word gets used kinda loosely - is a good thing.
I used to use the Chemi-pure product, it is very good, but expensive.
Your money goes further by using something like 'Black Diamond,' which is also very good.
If you didn't know, after rinsing, shove in some plain panty hose or a filter bag and put in your sump.
Carbon polishes the water quite well and removes yellowing.