Marineland Penguin 100 Bio Wheel Power Filter for up to 20G tanks

All Penguin BIO-Wheel Power Filters deliver simple, easy, 3-stage aquarium filtration ...without the hassle of air pumps, valves, tubing or air stones. 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 BIO-Wheel - proven best at removing toxic ammonia and nitrite. Penguin Filter maintenance is fast and easy. The Rite-Size Cartridge changes in seconds - with no messy assembly required. And the BIO-Wheel never needs replacing!

Leak Proof, Easy-Care Design One-piece tank and motor assembly means no O-rings to fail. Single moving part removes easily for cleaning. No oiling or motor maintenance required. Automatic Self-Starting Feature Restarts automatically. No messy siphons or valves. Worry-Free, Safety Engineering UL listed; cUL or CSA listed. Epoxy-sealed, moisture-proof motor ensures safe operation. The compact Penguin Mini is designed for smaller aquariums...and it's ideal for uniquely shaped aquariums, too.