Marineland Black Diamond Premium Activated Carbon 10 Ounces, Filter Media for Aquariums
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.
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