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MarineLand

Marineland Penguin Bio-Wheel Power Filter, Multi-Stage Aquarium Filtration

  • Based on 18,093 reviews
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Size: 50 - 75 Gallon Aquarium, 350 GPH


Features

  • WITH ROTATING BIO-WHEEL: Patented Bio-Wheel technology provides excellent wet/dry biological filtration.
  • MULTI-STAGE FILTRATION: Delivers mechanical, chemical and biological aquarium filtration to maintain a clean aquatic environment.
  • MARINELAND FILTRATION PRODUCTS: Count on Marineland brand for the most reliable, technically advanced aquariums and accessories on the market.
  • COMPATIBILITY: Use with Marineland Rite-Size Filter Cartridges (see individual filter for sizing recommendations).
  • FIVE SIZES: Available in 75 GPH, 100 GPH, 150 GPH, 200 GPH and 350 GPH sizes.

Description

Marineland® brand is the world’s leading brand of innovative equipment and environments for consumers wishing to create the ultimate aquatic showcase. Committed to fishkeeping success for over 40 years, the brand is the professional’s choice for commercial display systems and scientific research. Whatever you’re passionate about – freshwater or saltwater, big or small, beauty or science – make your aquarium your own. Marineland® Penguin® Bio- Wheel® Power Filter delivers easy, three-stage mechanical, chemical and biological aquarium filtration. This powerful filter contains patented rotating Bio-Wheel® technology to provide superior wet/dry biological filtration for nitrifying bacteria growth and eliminating toxic ammonia and nitrate fast. As it rotates, the Bio-Wheel exposes beneficial bacteria to the air, helping bacteria work harder and faster to keep your aquarium ammonia- free. The Bio-Wheel never clogs or needs to be replaced. All Bio-Wheel filters feature noise-reducing, two-piece vented covers and adjustable mid-level intake strainers. Uses Marineland Rite-Size™ Filter Cartridges with Black Diamond® Premium Activated Carbon to filter out dirt and debris for maximum water clarity. Available in five sizes: 75 GPH (for aquariums up to 10 gallons); 100 GPH (for aquariums up to 20 gallons); 150 GPH (for aquariums up to 30 gallons); 200 GPH (for aquariums up to 50 gallons); 350 GPH (for aquariums up to 70 gallons). Clean, sparkling water is the mark of a healthy, thriving aquarium. The amount of filtration needed to maintain an aquarium depends on a number of variables. These include tank size, individual maintenance habits and fish population. Whatever your individual needs, Marineland brand has the filtration products you need to deliver on-target, advanced filtration.

Specs & Other Info

Specification Details
Currently in Production Yes
Dimensions and Weight 8 (Height) x 15.25 (Length) x 6.12 (Width) inches; Weighs 3.53 Pounds
Model Identifier PF0350B
First Entered the Market June 20, 2004
Maker Marineland
Manufacturing Nation China

Frequently asked questions

The Penguin Bio-Wheel Power Filter is suitable for a variety of tank sizes, depending on the specific model. The 75 model is suitable for up to 10 gallons , the 100 model is suitable for up to 20 gallons, the 150 model is suitable for up to 30 gallons, the 200 model is suitable for up to 50 gallons, and the 350 model is suitable for up to 70 gallons tank.

The Bio-Wheel in the Penguin power filter serves as the biological filtration of the system. It helps in eliminating harmful ammonia and nitrate by encouraging the growth of beneficial bacteria. As water flows over the wheel, these beneficial bacteria break down these harmful chemicals, providing a safe environment for your fish.

Yes, the Penguin filter comes with a mid-level intake and adjustable flow, allowing you to control the speed of water that flows in your aquarium. It allows for custom water circulation based on the needs of your tank's inhabitants.

No, the Bio-Wheel generally does not need replacement unless it is damaged. It is designed to survive the life span of your aquarium, growing more effective as they mature. Replacing the Bio-Wheel can disturb the beneficial bacteria colony that helps with biological filtration.

Similar Products

Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.

The Marineland hang on back filters receives positive praise for its efficient filtration, with reviewers noting that it keeps their tanks crystal clear and odor-free. Users appreciate the bio-wheel functionality which holds beneficial bacteria aiding in maintaining a balanced ecosystem in the tank. The filter is easy to set up and monitor, and users have had long-term success with this product. A few users mentioned some initial challenges with setup, and noted that the filter can be a bit noisy.

Pros

  • 🐠 Provides clear and odor-free water
  • 🐟 Bio-wheel supports beneficial bacteria for a balanced aquatic environment
  • 🐡 Easy setup and maintenance
  • 🦀 Long-lasting and reliable

Cons

  • 🦑 Can be a bit noisy
  • 🐙 Some users had initial difficulties with setup

Should I Buy It?

If noise isn't a significant concern, the Marineland Hang on Back filter offers efficient filtration, easy setup, and contributes to a healthy aquatic environment. Users have found it effective and reliable over many years, making it a strong recommendation for any aquarium owner.

    • Superb filter system for all tanks
Size: 50 - 75 Gallon Aquarium, 350 GPH
I used to work as a marine biologist for a major state aquarium. Marineland bio pumps have been around forever. I have been using them for both salt and freshwater tanks in gallon sizes ranging from 10-200. All have worked flawlessly and I will continue to use them as both primary and secondary systems. They are far superior to anything except canister systems BUT in some ways, better than canister filters due to ease of maintenance. I will pick 3-4 of these at one time over a single system any day. Simply, one goes down (breaks), another is still keeping your tank clean and filtered. Please read!!! your fish and you will be much happier and stun everyone else... Advantages: 1) You don't have to shut it down. Pull the cartridge, rinse the new one with distilled water, slowly replace it back in the formed slots. No shutting down valves, seals/o-ring probs etc.. 2) They're pretty quiet but can get the "bubbling noise" when your water level drops below a certain point.Typically just below the flat part of the outlets. It won't hurt it or the fish if it does, it just gets that "noisy" waterfall sound which some, people feel it's soothing. Keeping the water level up is a good thing and remember, those bio wheels add oxygen to the water. Canisters don't. 3) They are easy to fix unless the actual motor goes bad. A wheel sticks? clean the roller pins and slots. 5 minutes. Impeller stops? try pulling and just clean the surfaces of the magnet and cavity; again a 5 minute job. You do have to unplug it for those two jobs. TIPS- A) Do yourself a huge favor and buy an extra set or two of cartridges. They are easily found from mom-n-pop pet stores to large chain stores. You CAN rinse the old ones in an emergency. B) Go to the grocery store and get a gl jug of distilled water and keep it. Reason? tap and even well water has trace elements and minerals that will kill the beneficial bacteria and cause a cloudy white appearance (bacterial bloom) for a cpl days. C) Motor/impeller maintenance - Unplug the pump. Lift the cover off, grab the intake tube (square) and slightly wiggle while pulling upward. Clean with a paper towel and white vinegar on the rubber "grommets" and silver pins you see.Basically, make sure everything that is suppose to spin, does so smoothly. D) Bio wheel sticking - Just lift the cover off. No need to unplug. Lift the sticking wheel outuse a Q-tip to clean the slots where the wheel rests. Lightly clean the silver roller pins on the ends. Replace. DO NOT CLEAN OR WASH the paper wheel itself. Sounds like work?? it's not... A canister or in tank filter is ten times more work and messy. These are awesome filters.. Get it and take heed to what I wrote. You'll be happy with it.... ... show more
Reviewed in the United States on October 9, 2015 by Shiprekd
    • Get the best. This is it.
Size: 50 - 75 Gallon Aquarium, 350 GPH
I've been useing Marineland filters for over 25 years. This one is outstanding, as I expected. Its worth every penny. I use them in salt and fresh water. I rarely lose a fish. Ive had tanks as small as 20 gallon and as large as 125. On the largest I use 2 filters. Keeping tanks can get very expensive. Do yourself a favor and buy the best you can afford. It will save your fishes lives and you'll find with good filtration you'll have less work on your tanks, less need for water changes. My salt water tank just gets topped off and a partial water change once a year. And the fish thrive. These filters are a workhorse. They last years running constantly. Very easy to change filters and maintain. This is the only filtration I can 100% recomend. Thank you. Oh I should add, I go bigger on size. This is going on a 29 gallon bow front. The filter is sized up to 75 gallon. Its a reef tank and I need lots of circulation. No such thing as overkill. ... show more
Reviewed in the United States on November 28, 2025 by Judy Durst
    • Keeps 60 gal clean
Size: 50 - 75 Gallon Aquarium, 350 GPH
The waterfall is pretty loud but the pump itself is not loud. The water is crystal clear and after I stir up sediment it’s quickly filtered out. I have only a few fish in this set up so far but the filter is said to handle a bigger bio load. It does have variable flow which is very important to me since all my fish like low flow. It sits on the side of imagitarium brand even with the weird black frame that those tanks have standard. I do recommend this filter but inspect it well after shipping because mine was beat around a lot and I saw a 3” hairline crack on the top after running it a week. It doesn’t affect my unit so I wasn’t worried about it but wish I caught it. If it doesn’t start pumping immediately your water level is too low. ... show more
Reviewed in the United States on December 27, 2025 by Juja Z.
    • Good filter.
Size: 50 - 75 Gallon Aquarium, 350 GPH
Went back to this filter after having issues with a canister filter. Works great still.
Reviewed in the United States on February 9, 2026 by Joshua F.
    • A good filter, not perfect, but will get the job done.
Size: 50 - 75 Gallon Aquarium, 350 GPH
My experience with this filter so far has been on par with most of the other reviews. I hope I can address some things for anyone thinking about buying this. I have a 55 gallon tank and bought the 350. I dont plan on getting any dirty fish, and considering the movement on this model, I am confident it is enough for the bioload I plan on having. I was leery of getting this over a fluval or aqueon after noise/functionality complaints but if it rates above 4 stars on average it's fair game at that point. It was on sale for about $30 when I ordered it and money talks. Im not an extreme hobbyist or fish wrangler, just a girl who would like a pretty fish tank in her house and has done her homework. So if terms aren't correct or I don't make sense, I apologize. Anyways, To keep it simple, pros and cons: Pros: It is easy to put together. It literally is just common sense linking pieces together and putting in cartridges. It took no more than five minutes. After filling up my tank, and getting it started I was concerned it would be hard to prime. It wasn't. I poured in two cups of water in each side and it was up and spinning. Took about 30 seconds. Max. You put on the little lids which just kind of sit on top of everything without stopping the flow. -The motor IS NOT and SHOULD NOT be loud. I wonder if the people complaining about this followed general fish keeping instructions, let alone the product's. There is a rim at the top of most aquariums, usually black or brown metal/wood. This is where your water level should be regardless of filter. If it is any lower, then there is an amount of space the water has to drop, making more and more noise. The water makes the noise, not the filter. With that said, even the water quickly calms down if people could wait more than 12 hours before writing a review. The instructions clearly tell you to wait at least 24 hours to let the filter break in. The only thing I can hear from roughly 3-4 feet away is trickling water, which is considered white noise and something human beings can naturally block out within a matter of minutes. If I focus on it, yeah duh I can hear it, but it is not enough to tickle me bothered. Its sound, but not unpleasant sound. If you have an aversion to white noise (the sound of thunderstorms, babbling brooks, the sound of the beach) then I suppose this isn't the filter for you. But none of the folks in my house have said "AHH CURSE THAT LOUD FILTER I CANT HEAR THE TV!" -It has room for 4 cartridges at a time. In a sense, that would be great for bigger bioloads without having to get additional filters. Its a nice option. Not one I need right now, but I appreciate the thought. -I cant confirm or deny whether or not it is at 350 gph, but it definitely pushes out enough water to lead me to believe it does. I trust it. Cons: The noise may not be for everyone. I could easily fall asleep with a sound like this in my room. But, I can see why someone couldn't. In my living room it is drowned out. But, if you are all very quiet people who dont make a sound all day, then I suppose you would hear it a lot. We yell and laugh and generally live in our living room thus I could easily be downplaying the sound. -Theres no way to control the flow. I don't need to, but it wouldve been nice at least. -The instructions dont really specify what this one part is. Its a knobule on the intake that moves up and down between vented and covered. I have no clue what it does but would be happy to be enlightened. -This is personal opinion, but its not very nice looking. Ive seen other filters and they dont seem so...intrusive. I appreciate it's size and power but the intake just makes me feel like theres this invasive hand reaching in my tank and gobbling up water. In a 55 gallon there is only one place to put it--in the back corner, next to a heater, tubing, and what I consider the "ugly corner" full of tubing and the heater. Mine is poorly covered with silk plants. In conclusion, its a good filter with some setbacks. I will chalk up any users with mechanical issues being lazy and not cleaning/maintaining it regularly. If you don't want to do that then I say spend the money on something more expensive. It isn't delicate, per se, but I would expect anything in which you are paying a smidge less you could take a whopping 15 minutes every month to clean and check to make sure it is functioning properly instead of whining until the motor burns out from lack of care. ... show more
Reviewed in the United States on July 14, 2012 by S. Knox

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