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. 

• Removes more discoloration, odors, and impurities*
• For sparkling clean water
• Ideal for all aquarium filters

*Based on a 2015 University study compared to our next leading competitor