If it works, keep it.
You have a modern sleek boat, with space below decks probably at a premium. Upsizing your vent hose as other forum members are saying, may be a difficult task. I do not have a filter on mine as I have a large diameter short run of vent line.
The argument they make is that you don't want your tank to be aneorobic, because that 8s what causes the stink.
If it is the big orange I am thinking of, it is made to be refilled. You can by a refill kit $$ or go to a pet store or Amazon and buy some pellets and raid the O-ring kit (everyone who does their own mechanical work should have an O-ring kit).
The proof is if it stinks after you flush, if you need to change it or not. If it is a few years old, I would change it. If you haven't changed it before, I would buy the kit (or at least look at one in the store) and make note of what is in there, to try and duplicate it with pet store and hardware store items next time.
Sometimes the enemy of the best, is good enough; right Voltaire?