Diamond Blend® Diamond Blend Premium Activated Carbon and Ammonia-Neutralizing Crystals are ideal for new aquariums. This special formulation of new faster-acting Black Diamond and super-effective White Diamond cleans and condit...
Custom designed for the Magnum 220 and 350 micron cartridges and carbon/media container, these filter sleeves reduce accumulation of waste and dirt, ultimately extending cartridge life.
Black Diamond 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 granules are speci...
Replacement Cartridge for Penguin 170, 200, 330 & 350 Filters