I try cheaper carbons because they are on sale and always end up with problems. Fluval carbon is the best when you fill your own bags and rinse it weekly. Fancier more expensive carbons that promise so much more usually fail me. I always end up admitting Fluval works the best for me. You can usually tell when its reached its life span when you run real warm water over it and nothing comes out. But most the time it lasts quite awhile and really does the job. I usually save some older stuff to remove medications and then put new stuff in. So even when you think its spent it still works a little more. The cheaper stuff doesn't.

Very low dust when rinsing.

Cheap price for a lot of carbon.