Marineland Penguin PRO Hang-On-Back Power Filter

About This Product

The Marineland Penguin PRO Hang-On-Back Power Filter is a high-performance aquarium filtration system designed to provide exceptional water clarity, efficient biological filtration, and quiet, reliable operation. Featuring Marineland’s innovative BIO-Wheel technology, advanced three-stage filtration, and adjustable water flow, the Penguin PRO delivers effective filtration for freshwater aquariums ranging from small desktop tanks to larger tropical fish displays.

Designed with convenience and performance in mind, the Penguin PRO combines mechanical, chemical, and biological filtration to help maintain a clean, healthy aquatic environment. Its replaceable filter cartridge captures suspended debris, uneaten food, and other particles, while activated carbon helps remove odors, discoloration, and dissolved impurities.

The Penguin PRO’s signature rotating BIO-Wheel provides highly effective wet/dry biological filtration. As the wheel rotates, beneficial nitrifying bacteria are exposed to both aquarium water and oxygen-rich air, supporting the natural biological processes that convert harmful ammonia into nitrite and then into less toxic nitrate.

Unlike traditional aquarium filters that rely solely on submerged biological media, the BIO-Wheel design promotes efficient oxygen exchange and creates an excellent environment for beneficial bacterial colonies.

The Penguin PRO also features an ultra-quiet, decoupled motor design that helps reduce vibration and operating noise. This makes it an excellent choice for aquariums located in bedrooms, living rooms, offices, and other areas where quiet operation is desirable.

Adjustable flow control allows aquarists to customize water circulation to accommodate different aquarium sizes, fish species, and aquatic environments. The convenient hang-on-back design keeps filtration equipment outside the aquarium, preserving valuable swimming space while providing easy access for maintenance.

Available in multiple sizes for aquariums up to 90 gallons, the Marineland Penguin PRO offers reliable filtration for freshwater community tanks, tropical fish aquariums, goldfish setups, and decorative aquatic displays.

Whether you’re setting up a new aquarium, upgrading an existing filtration system, or looking for dependable BIO-Wheel filtration, the Marineland Penguin PRO provides powerful performance, convenient maintenance, and proven biological filtration technology.

Features:

• Advanced three-stage filtration combines mechanical, chemical, and biological filtration to maintain cleaner aquarium water.
• Patented BIO-Wheel technology provides efficient wet/dry biological filtration for beneficial nitrifying bacteria.
• Supports the aquarium nitrogen cycle by encouraging bacterial colonies that convert harmful ammonia and nitrite into less toxic nitrate.
• Ultra-quiet decoupled motor reduces vibration and operating noise for a more peaceful aquarium environment.
• Adjustable water flow control allows customized circulation for different fish species and aquarium conditions.
• Effective mechanical filtration captures suspended debris, fish waste, and uneaten food.
• Activated carbon chemical filtration helps remove unwanted odors, discoloration, and dissolved organic compounds.
• Marineland Rite-Size filter cartridge compatibility makes routine filtration media replacement convenient.
• Rotating biological filtration wheel provides continuous exposure to oxygen-rich air and circulating aquarium water.
• Hang-on-back installation keeps bulky filtration equipment outside the aquarium while preserving swimming space.
• Convenient top-access maintenance provides easy access to filter cartridges and biological filtration components.
• Efficient water circulation helps maintain consistent filtration throughout the aquarium.
• Multiple filter sizes available accommodate freshwater aquariums from small desktop tanks to larger community systems.
• Reliable aquarium filtration supports stable water quality when combined with regular maintenance.
• Suitable for freshwater community aquariums including tropical fish, goldfish, and ornamental freshwater species.
• Easy-to-maintain design makes the Penguin PRO suitable for beginning and experienced aquarium hobbyists.

Specifications:

• Brand: Marineland
• Product name: Penguin PRO Power Filter
• Product type: Hang-on-back aquarium power filter
• Filtration method: Mechanical, chemical, and biological
• Biological filtration: Rotating BIO-Wheel
• Chemical filtration: Activated carbon filter cartridge
• Mechanical filtration: Replaceable filter cartridge
• Motor design: Ultra-quiet decoupled motor
• Water flow: Adjustable
• Mounting style: Hang-on-back (HOB)
• Filter media: Marineland Rite-Size replacement cartridges
• Aquarium compatibility: Freshwater
• Available models: Penguin PRO 100, 125, 175, 275, and 375; 450-size PRO filtration is also listed in the broader Marineland range
• Maximum aquarium capacity: Up to 90 gallons, depending on selected model
• Power requirements: Model-specific
• Recommended application: Freshwater community aquariums, tropical fish tanks, goldfish aquariums, and ornamental freshwater displays

Available Models and Flow Rates

Model	Maximum Aquarium Size	Maximum Flow Rate
Penguin PRO 100	10 gallons	100 GPH
Penguin PRO 125	20 gallons	125 GPH
Penguin PRO 175	30 gallons	175 GPH
Penguin PRO 275	50 gallons	275 GPH
Penguin PRO 375	75 gallons	375 GPH
PRO 450	90 gallons	450 GPH

The 450 model may be marketed as the Emperor PRO 450. Verify the product label when selecting that size.

Installation and Maintenance Recommendations:

Install the Marineland Penguin PRO Power Filter securely on the back of a compatible aquarium, ensuring the intake tube is properly assembled and positioned below the water surface.

Follow the manufacturer’s startup instructions and ensure the filter is ready for operation before connecting electrical power.

Adjust the flow control to provide appropriate circulation for the aquarium’s size and inhabitants. Fish that prefer calmer conditions may benefit from reduced flow, while more active species may tolerate stronger circulation.

Inspect the filter cartridge regularly and replace it according to the manufacturer’s recommendations or when accumulated debris restricts filtration performance.

The BIO-Wheel should be allowed to develop a healthy colony of beneficial bacteria. Do not routinely replace or aggressively scrub the BIO-Wheel, as this can remove beneficial bacteria essential for biological filtration.

If excessive debris accumulates on the BIO-Wheel, gently rinse it in dechlorinated water or removed aquarium water. Brown discoloration is normal and often indicates established beneficial bacterial growth.

Periodically clean the intake tube, impeller, and filter housing to maintain efficient water circulation.

Important Compatibility Information:

The Marineland Penguin PRO series is available in multiple sizes. Select the appropriate model according to aquarium capacity, fish population, and filtration requirements.

Replacement cartridge requirements vary by model. Verify the correct Marineland Rite-Size cartridge before purchasing replacement media.

For aquariums with heavy biological loads, including goldfish systems, additional filtration or a larger-capacity filter may be beneficial.

Recommended application: A quiet, reliable hang-on-back filtration system ideal for freshwater aquariums requiring effective mechanical, chemical, and biological filtration with Marineland’s proven rotating BIO-Wheel technology.