The Marineland Penguin 150 Power Filter features complete 3-stage aquarium filtration to keep your aquarium clear, clean, and healthy. The patented Marineland bio-wheel system provides oxygenated surface area for nitrifying bacteria, which keeps your aquarium totally free of harmful ammonia and nitrites. High flow rates maintain optimum water circulation and ensure proper bio-wheel rotation. The adjustable mid-level intake strainer allows you to take aquarium water from mid-tank for complete circulation.
The Penguin150 cover design and sealed motor reduces water noise while maintaining optimum oxygenation. The Penguin model 150 uses the handy Rite-Size B filtration media cartridges so choosing the correct replacement media is simple. Penguin filter cartridges take care of all mechanical and chemical filtration in your aquarium and are extremely easy to replace. For complete, easy aquarium filtration for your aquarium, nothing works like a Penguin filter. The Penguin 150 is rated for aquariums up to 30 gallons, and has a maximum flow rate of 150 gph.
I normally don't write reviews online but it bothers me that the only customer review on this product received only a half a star. This filter is a tried and true design. I have one running on a 20 gal freshwater tank for 7+ years and it keeps my fish and shrimp alive. As a hang on tank power filter, it is one of the better ones on the market. The replacement media cartridge does get clogged if you don't occasionally rinse and replace it under heavy fish load which is typical for this type of filter. If you used this filter and don't think it helps one single bit, I suggest you are using it incorrectly.