Emperor® Power Filters

Product No. PF0280BD
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Perfect aquarium filters for both freshwater and saltwater aquariums.

Emperor® Power Filter Systems are advanced aquarium technology at its finest. With a revolutionary design, the Emperor’s flow and filtration efficiencies are unmatched by other filters in their class.

Featuring as much as twice the filter cartridge capacity, additional chemical filtration capability, and extra large, spray bar-driven BIO-Wheel wet/dry biological filtration, Emperor Filter systems offer aquarists a filtration system that can stand up to any aquarium they can dream of.

Emperor® Power Filters is rated 3.7 out of 5 by 56.
Rated 4 out of 5 by from Great Filter system I have the system for two mounts now, it's doing a great job.
Date published: 2017-03-05
Rated 1 out of 5 by from The worst filter ever! I bougth it 3 month ago. Few days back it started doing noise and spary bar doent work, I cleaned everthing: impeller, spray bar and the bottom of the filter. I am really upset!!does it has warranty?
Date published: 2017-02-26
Rated 5 out of 5 by from Penguin longevity I have a Penguin 300 which i bought around 30years ago and it has just given up today, i cannot find any aquarium shop here in Australia who stocks them, can you give me a contact Number or agent to contact as i desperately need to replace it. On past performance i cannot go past this filter and highly recommend them to anyone considering purchasing one.
Date published: 2017-02-12
Rated 5 out of 5 by from Support Saved Lives My Penguin Bio 350 developed an intermit grinding sound after 6 months that caused my Rabbit to thump so loud that the neighbors called 911, shots fired. After all measures failed, I called Customer support with new no-charge empeller assembly. Results: Rabbit and Fish are out of Therapy. Family has moved back in. Roy
Date published: 2017-02-04
Rated 1 out of 5 by from Noisey and propeller problems i bought this filter about two months ago and the filter is noisey and i keep have propeller problems this makes my 3rd purchase of this filter the rubber piece at the top of the propeller has came off like the other two .not Happy with the filter
Date published: 2016-12-24
Rated 5 out of 5 by from Best filter ever owened I have a 65 gal saltwater tank, I was told don't waste my money on the 350 Filter. It's the BEST filter I ever owned. Water is crystal Clear . No more socks for me.
Date published: 2016-11-29
Rated 5 out of 5 by from Solid filter I have been using this filter for years now. Unfortunately it has become very loud still works perfectly however the noise is extremely annoying. I would like to buy another one to replace the current noise box but I can't seem to find an emperor 280 anywhere for sale. Other than having noise after years of use I still want another one because there isn't another hang on power filter that works as well as this one great overall design.
Date published: 2016-11-27
Rated 5 out of 5 by from still think its the best filter for the money i read a lot of the reviews about these filter and its unfortunate that some people have issues with it. i have used mainland products for my aquariums through the 30 plus years I have had aquariums and the emperor and penguin as well as the magnums and have had great success with all of them. i have 4 emperors running split between two 65 gallon aquariums they are quiet both are in my bedroom all i hear is the water moving. These filters are easy to maintain as well. i utilize the reusable media containers
Date published: 2016-11-26
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My Emperor 400 is only 6 months old. How can I stop the terrible rattle it makes? I bought a new impeller and recommended filters and it still happens. Do I have to turn off my bubbles or completely rebuild it.

Asked by: Paula 68
If you have a bubbler near it, that's the issue. Bubbles traveling up the intake tube will always cause a terrible rattling sound. Sand is also a culprit of this type of noise, so if you have sand, put filter floss inside the bottom strainer. Otherwise, clean out the impeller whenever the noise occurs in case it is other debris, but it sounds like the issue will be the bubbler. BREX
Answered by: BREX
Date published: 2017-03-14

Just curious, how often should I change the carbon insert sin my Emperor 400 I have it in a 75 gallon freshwater community tank (16 fish) with live plants.

Asked by: Gino
It is recommended to change carbon out at least once a month. BREX
Answered by: BREX
Date published: 2017-03-07

I cleaned out my thing that spins (sorry for not knowing the real name) and it just vibrates and doesn't spin anymore.  What to do?  Thanks, Ruth 

Asked by: RuthS
Ruth, Thank you for your inquiry and we are sorry to hear this. The part that you are referring to is the Impeller assembly. We would recommend that you replace the impeller (#PR2126) which can be purchased online. Just type in the item number in the search box on the Marineland website. Thank you, Christina
Answered by: MINI
Date published: 2017-02-28

I just bought my 60 gallon tank and i am currently using the emperor 400 filter. Followed the directions on the box, added water to both filter and tank before running. And this weird sound doesnt go away. I wish i could record it and sent to you guys.

Asked by: Katteryn83189
Katteryn83189, Thank you for your question. We can email you directly for you to send a clip of what the filter is sounding like. Also, make sure that the water level in the tank is no more than one inch away from the framing that is around the top. If the unit is not quiet after all of that, then you might need to try to reseat the impeller of the filter as it might have come loose during transport. Christina
Answered by: MINI
Date published: 2017-02-27

I am creating an ecosystem tank and was wondering it the emperor 400 can be used on a salt water tank.

Asked by: John12
Yes, it most certainly can be used on marine as well as freshwater tanks. BREX
Answered by: BREX
Date published: 2017-02-13

The spray tube for the biowheel does not stay snuggly attached to the side where the water comes into it. The water travels outside the tube and down it to drip off side onto floor. What can I do to fix this? I dont have this problem with my double wheel

Asked by: StacyR
There is an o ring that fits onto the end of the spray bar. Check to make sure this is in place properly, and not pinched or damaged. Please reach out to us at 1-800-322-1266 if you need a replacement o ring. BREX
Answered by: BREX
Date published: 2017-01-27

I have had an Emperor Power Filter 400 for about 8 months. Recently, I was having issue with the water flow and the system making some noise. I cleaned everything and water flow improved greatly , but I still have the noise. What else should I try?

Asked by: timva319
Depends on what type of noise you are hearing, and what your set up is like. Try soaking the impeller in distilled white vinegar, and swabbing out the motor with a twisted paper towel and vinegar as well. Run a wire brush through the intake tube, and check to make sure the flow manifold cover connects properly to the housing. BREX
Answered by: BREX
Date published: 2017-01-23

Would it be beneficial to fill the large sumps on the back of the filters with bio media like ceramic rings or something else? There is so much space in these sumps. But, the media will basically be submerged in water all time. I have 2 on my 60gal. 

Asked by: Dbro69
Thank you sir for your answer. My thinking is that there is so much sump space in these filters and filling them up seems like a no-brainer. I am running one biowheel on each filter and one rite size E cartridge on each. And filled up one xtra cartridge on each filter with ceramic media. They flow so much water and that's what I like. But just want to use these as best as they can befor now. Had one that was really noisey after the move, but put some vasaline on the impeller and it is acceptably quiet
Answered by: Dbro69
Date published: 2017-01-18
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 Emperor Power Filter Manual

Emperor Quick Set Up Guide


Certified Flow Rate

Aquarium Size

Rite Size Media

Emperor 280

280 GPH

up to 50 gallons


Emperor 400

400 GPH

up to 80 gallons


Penguin & Emperor Cartridge Dimensions