Filter Cartridge 12pk - Biomaxx 10/30 Filter Deep Blue Professional BioMaxx power filter cartridge is the ultimate in performance and convenience The multi-layer polyfiber outer shell traps debris and organic particles, while the premium carbon inside absorbs dissolved contaminants, odors, toxins and discoloration The rigid frame incorporates a media-grid design that ensures even distribution of the carbon granules The 1-piece sealed design allows for quick and easy cartridge replacement, while the convenient top handle keeps hands clean and dry during filter maintenance The BioMaxx Medium cartridge fits BioMaxx 10 and 30 filters. Used in conjunction with the BioSponge foam filter pad, it provides complete mechanical, biological and chemical filtration