Marineland Bio-Wheel Penguin Power Filter Cartridges provide premium acitvated carbon for efficient mechanical and chemical filtration, keeping your water crystal clear and clean. Rite-Size C cartridges are easy to replace and designed for maximum water contact.
Inside the filter cartridge, a patented ribbed backing ensures the even distribution of activated carbon to deliver maximum water-to-carbon contact. There is no "tea bag" effect and no water bypass as with loose or bagged methods. Contains Marineland Black Diamond Premium Activated Carbon.
For best results, change cartridge every 2-4 weeks.
Fits: Marineland Penguin 170, 200, 330 & 350 Power Filters.
Dimensions: 6.5"L x 5.8"W
Placement: Black plastic side faces front of filter, blue side faces back.