Emperor® Power Filters

Product No. PF0400BD
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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 10.
Rated 3 out of 5 by from Amazing water flow and power VERY HIGH maintenance needs cleaned 2 times a week if you want the filter to last longer then 2 weeks cheaply made sadly but very effective if you keep it looking brand new. when you clean it, be careful when removing the intake from the top. PUSH DOWN on the square middle black piece the intake pipe goes into whiling SLOWLY pulling the intake pipe out. ALSO if you have a sand bottom tank DO NOT USE THIS FILTER sand will get into the intake and completely destroy your filter. id advise anyone to buy the canister filter or any exterior sump pump. hope this helps
Date published: 2018-01-25
Rated 3 out of 5 by from I wish I could get my hands on a 280gpm I've got 2 of the 400s on my 75G tank, work great low maintenance.My only complaint is I've got a smaller tank 40G that the 400 will not fit on but the 280 would, but I can't find in store or online that ships to Canada.
Date published: 2018-01-15
Rated 4 out of 5 by from Noise I've had the filter for a few year & it works fine. The problem I'm having now is that it has gotten very loud/noisey. I replaced the impeller, but the noise continues. It appears the bottom piece that goes around the impeller is loos e & falls off & I think this is making the racket. Can this be replaced with an oversized piece to prevent it from drpping off & hopefully cure the problem?
Date published: 2017-12-21
Rated 2 out of 5 by from Marineland Power Filters I’ve bought these filters for years but now rethinking. After a couple years (2) I’ve been having to replace the impellers. It’s already starting to wear out the rubber like ends. Also the bio wheels quit spinning and they just don’t spin. Replacement parts are available hence rethinking buying more. The last filter I bought lasted for many years with out much maintenance.I moved from Virginia to Utah and bought all new equipment, not sure if that is a factor.
Date published: 2017-12-13
Rated 2 out of 5 by from Did not last as long as I would have liked I have had to replace the impeller multiple times. Other than that it has worked perfectly until recently. After a little more than a year of having it it has stopped working and will not even try to start up again.
Date published: 2017-12-12
Rated 3 out of 5 by from Been using for years I’ve bought these filters for years but now rethinking. After a couple years (2) I’ve been having to replace the impellers after 6 months on 3 of them. It’s already starting to wear out the rubber like ends. Also the bio wheels quit spinning, bought replacements and they just don’t spin. Replacement parts are speedy hence rethinking buying more.
Date published: 2017-12-05
Rated 5 out of 5 by from Emperor 400 The only reason I have had to replace this filter is due in fact to the many power outages in my area,other than that, it's the best pump I've ever had, I use two of them on my 125 gallon aquarium, no problems at all otherwise.
Date published: 2017-11-30
Rated 5 out of 5 by from Efficient and quiet and great customer service I bought my filter almost a year ago and it worked great....it did begin to be noisy though so I wrote Marineland for advice. They just sent me a new pump. Great customer service. I was problem shooting but they replaced it fast!!!! Good job!!!!
Date published: 2017-10-24
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How do I replace the spray bar on an Emporer Bio wheel filter

Asked by: Gadgetgirl
Those are sold separately. You basically pull it out and insert the new one. http://www.marineland.com/Products/aquarium-parts/Filtration-Products-and-Skimmers/Emperor-Parts/Spray-Bar-Assembly-Emperors-PF280B-PF400B-PF280BD-PF400BD.aspx. There is a gray clip on yours that you need to keep to lock onto the new one. BREX
Answered by: BREX
Date published: 2018-03-15

Is there a store in Rochester mn that carries a marineainland #p filter?

Asked by: Jo Befort
Probably not. That is only sold through Petsmart online, and www.amazon.com. BREX
Answered by: BREX
Date published: 2018-02-21

What gallons does a biowheel 350 system support in fish tanks?

Asked by: Pw25
The Penguin 350 is rated for tanks up to 70 gallons. The 400, whose page you linked here, is for tanks up to 80 gallons. BREX
Answered by: BREX
Date published: 2018-02-12

Our filter seems to have quit, We’ve had it less than a year and clean it completely once a month and today I noticed it had just stopped pumping. We have the BIOwheele 350 Penguin model. 

Asked by: Skaye
Remove the impeller and impeller housing. Soak the impeller in distilled white vinegar after removing any debris you find. Swab out the motor itself (middle of the bottom of the box) with white vinegar as well. You may have hard water or calcium buildup which can only be removed with vinegar. If this doesn't work, please call 1-800-322-1266. BREX
Answered by: BREX
Date published: 2018-01-31

The carbon I have been using seems to fall to the bottom of the media holder. Is there a larger carbon or am I loading it wrong?

Asked by: Jodi L
There are definitely different types of carbon on the market, ours is Black Diamond. Make sure you are filling the media container completely. If it is ours, lay it flat, and fill each section before snapping it together. BREX
Answered by: BREX
Date published: 2018-01-22

I noticed that the small collar that the inlet tube attaches to near where the impeller seats is broken on mine. I just got this 400 not too long ago. I do remove the impeller once a month for cleaning but am always careful when putting everything back.

Asked by: Jodi L
Please call our Care Team for a replacement part, 1-800-322-1266. BREX
Answered by: BREX
Date published: 2018-01-22

I have a model # PF300B. do you hve replacement wheels and filters

Asked by: hoover
Here are the bio wheels: http://www.marineland.com/Products/aquarium-parts/Filtration-Products-and-Skimmers/Penguin-Parts/BIO-Wheel-Parts-for-Penguins/BIO-Wheel-Assembly-for-Penguin-PF330B.aspx and here are the cartridges, you need Rite Size C. http://www.marineland.com/Products/aquarium-filtration-filter-media/rite-size-aquarium-filter-cartridges-filter-parts/penguin-power-carbon-aquarium-filter-cartridge.aspx BREX
Answered by: BREX
Date published: 2018-03-15

Please tell me the dimensions the Emperor 400 needs between the back of the tank and my wall, and the clearance between the unit and a shelf above it?

Asked by: BeCycle
Total dimensions of the Emperor 400 is 17 X 7 X 10.5 and the outside dimensions are 17 X 4.5 X 10.5. BREX
Answered by: BREX
Date published: 2018-01-15
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PF0400BD - 80 gal/400 GPH

 Emperor Power Filter Manual

Emperor Quick Set Up Guide


Certified Flow Rate

Aquarium Size

Rite Size Media

Emperor 400

400 GPH

up to 80 gallons


Penguin & Emperor Cartridge Dimensions