Marineland Black Diamond Activated Carbon 22oz

2-10 Days 

Black Diamond® Media Premium Activated Carbon eliminates discoloration, odors, and impurities...and keeps on doing it long after other carbons quit.

Heat-activated bituminous coal-based Black Diamond Media granules are specially sized and far more efficient than inferior coconut, wood or peat-based carbons. Black Diamond Media works as much as twice as fast as the competition.