Check the listing for details. MARINELAND PENGUIN 100B BIO-WHEEL POWER FILTER for AQUARIUMS. Condition: New. Listed at 20.99 USD. Listing is for ( 1 ) : MARINELAND PENGUIN 100B BIO-WHEEL POWER FILTER Penguin BIO-Wheel Power Filters deliver easy, three-stage mechanical, chemical and biological aquarium filtration. Convenient Penguin Rite-Size Filter Cartridges come ready to use with each filter.Ready to mechanically and chemically remove waste, discoloration and odors. Each contains new faster-acting Black Diamond Premium Activated Carbon for maximum efficiency.Biological filtration is provided by the revolutionary and patented BIO-Wheel - proven best at removing toxic ammonia and nitrite. Certified flow rate of 100 GPHPerfect for all aquariums up to 20 gallons. For Freshwater and Marine Tanks.Uses the Rite-Size "A" filter cartridge. All BIO-Wheel filters feature Noise-Reducing Two-Piece Vented Covers, and Adjustable Mid-Level Intake Strainers. Please feel free to contact me for combined auction shipping rates or with any questions or concerns that you may have about my products. Thank you !