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 3.4 out of 5 by 12.
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
Rated 5 out of 5 by from Great Service when help needed! I have had a series of these filters which last for 5 to 6 years and by then somethings wear out and I buy a new one. My more recent filter was fine except it would stop pumping water to the bio wheels unpredictably. I thought maybe the fit for the impeller was a bit tight. Anyway I asked for help and got a very quick response saying you need this and this which they mailed out gratis. I installed the new parts and my filter is working as I expect it too. What a great company!
Date published: 2017-09-08
Rated 5 out of 5 by from never quit I've had this filter over ten years at least, a few parts fatigued over the years but nothing a twist tie couldn't fix. Paws now petco, gave me their spare pieces, (plastic spray tubes, clips) from old filters they didn't use. I'm about to finally get a replacement. Mine is STILL working, just so much salt buildup , little broken parts etc, and reduced water flow Warrent it. Again it's well over over ten years old. My best guess is 2004, it's 17 now. Great dual bio wheel system.
Date published: 2017-08-12
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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

Is there a spec sheet showing the wall clearance needed behind the aquarium for each of the Penguin and Emperor HOB filters?

Asked by: WayneO
Not that we send out, no. The Penguins need an average of 4" and the Emperor needs 5". BREX
Answered by: BREX
Date published: 2018-01-09

Are the bio wheels available for sale?   I need three    

Asked by: Gracie
Yes, they are available through out website, www.amazon.com, www.petsolutions.com, other sites, and local fish stores. http://www.marineland.com/Products/aquarium-parts/Filtration-Products-and-Skimmers/Emperor-Parts/BIO-Wheel-Assemblies-for-Emperors.aspx. BREX
Answered by: BREX
Date published: 2018-01-09

How far does the Emperor 400 extend behind the fish tank?

Asked by: josiah2
It extends 4.5". BREX
Answered by: BREX
Date published: 2017-12-22

What should I use for a 100 gallon tank?

Asked by: Rodney 2445
That depends on what you intend to house in it, but two of the Emperor 400 filters will definitely work or a Magniflow 360. BREX
Answered by: BREX
Date published: 2017-12-21

I have a 20 gallon heated, lightly planted glass aquarium with one betta. What filter would you recommend? Also, would a UV sterilizer be ok to use in the tank? Thanks!

Asked by: Amy101
We would recommend the Penguin 150 for this tank, and yes, a UV sterilizer would be fine, but not very necessary for a tank with very little fish load. Your betta would love some companions such as white clouds, corydoras catfish and nerite snails. BREX
Answered by: BREX
Date published: 2017-12-05

I need this Emperor filter. What is PRICE, and can I order from you and have it delivered ?? Thank you. Deborah

Asked by: Deborah MacFarlane
Hello Deborah, No, we do not sell direct, but Amazon.com, www.thatpetplace.com and Petsmart carry this filter. BREX
Answered by: BREX
Date published: 2017-12-04

Why did marineland stop making the emperor 280 ?

Asked by: Helnaak
Lack of sales, essentially. BREX
Answered by: BREX
Date published: 2017-12-04

how can i get the filter in filter box, filter seems too big for box

Asked by: who cares
The filter cartridges slides into the filter box, not the media container. There are slots it slides into, and the black plastic faces the front with the floss towards the back. If there is excess floss, you can fold or trim it. BREX
Answered by: BREX
Date published: 2017-12-01

I have 120 gal tank and it came with2 emperor 400. But no bio wheel. I bought a new one, With extension the bottom is about 3in away from the sand in bottom. IS this too close for it to work?? it wasnt working but did n smaller tank that i didnt use exts

Asked by: ashley95
Yes, when sand is in use, we recommend the intake tube not being more than halfway down in the tank. Also, it is a good idea to place filter floss inside the bottom strainer or use a sponge accessory purchased separately, to cover the strainer. BREX
Answered by: BREX
Date published: 2017-11-15

Is anyone at Marineland working on making the emperor 400 filters quieter. I have one on my 55 gal tank for 8 years and the filtration is great but it's not quiet. I bought a new impeller and it was quieter but not quiet. Now it's loud again. 

Asked by: MikeFitz
We changed the impeller about 2.5 years ago and this made the filter silent. However, if you have the old style Emperor with the new impeller, you also need the flow manifold cover to make sure it stays quiet. The impeller and manifold cover are sold together. BREX
Answered by: BREX
Date published: 2018-03-05

Used two Emperor 400 filters on my 90 gallon tank for over ten years with excellent results. Recently replaced one but was very disappointed to find there is no way to reduce the flow rate without completely shutting the filter off. Is there a way?

Asked by: RudeGoose12
No, not other than closing the mid-level strainer. That change occurred back in 2002-2003. BREX
Answered by: BREX
Date published: 2017-11-09

Would I be able to put a Emperor 400 pro series on a 30 gallon tank ? What I thought is maybe bigger filter for smaller tank better filtration ? 

Asked by: Aaronvidal
No, it would be way too big for a 30 gallon most likely. It would depend on the type of fish and you would need to leave off the mid-level strainer and extension. Just attach the bottom strainer to the intake tube, but it would probably be too powerful. We would normally recommend the Penguin 200 for that size, instead, if you wanted a larger filter. BREX
Answered by: BREX
Date published: 2017-11-03

Another quick question is there a difference between a Experor 400 Pro or regular Emperor 400 ? 

Asked by: Aaronvidal
The only difference is the impeller. The Pro was rated for 90 gallon tanks, and the latest version is rated for up to 80 gallons. The new impeller is quieter but a tad slower. All current parts fit both of them though as long as you have the current manifold housing COVER. BREX
Answered by: BREX
Date published: 2018-01-05

I would like know if I can get new bio wheels for my filter. The petsmart where I got the said you can not get the bio filters said she they should never fail well guess what I have one that failed

Asked by: Go fish
Bio wheels are readily available on our site, other websites and at local fish stores. They only need replacing when they become damaged. If they stop rotating, most of the time you need to maintain the filter system by taking it apart, and cleaning it out, especially the motor and the impeller. You should also clean the bio wheel bearings, and make sure they are properly installed in the filter box. If you need the Penguin 350 bio wheels, they are sold here: http://www.marineland.com/Products/aquarium-parts/Filtration-Products-and-Skimmers/Penguin-Parts/BIO-Wheel-Parts-for-Penguins/BIO-Wheel-Assembly-Penguins-200B-and-350B.aspx and here: http://www.petmountain.com/product/aquarium-filter-bio-wheels/11442-576312/marineland-marineland-replacement-bio-wheel-for-eclipse-2-emperor-280b-400b-filters.html?utm_source=googleproductads&utm_medium=cpc&gclid=CjwKCAjw9O3NBRB3EiwAK6wPT488vZo193VYsPNfTGD0DiBrROdoXKw2ezn54AGw5NODBt1yqwZ8TRoCgngQAvD_BwE as well as other websites. Petsmart does not carry parts, which is why they told you what they did. BREX
Answered by: BREX
Date published: 2017-09-15

What power filter replaced the 280B 

Asked by: Ez Lopez
None did. We only have the Emperor 400. Next closest in size is the Penguin 200. BREX
Answered by: BREX
Date published: 2017-09-12

Where can I buy bio wheel filter replacement?

Asked by: Srdegler
These are available through various online vendors, and local fish stores. They are also available on our site: http://www.marineland.com/Products/aquarium-parts/Filtration-Products-and-Skimmers/Emperor-Parts/BIO-Wheel-Assemblies-for-Emperors.aspx. BREX
Answered by: BREX
Date published: 2017-09-12

Looking for smaller filter than #280 for 15-20 gal.tank for salmon rearing with chillers and water temps. under 40 degrees. Would you recommend Emperor 200?

Asked by: Uppie56
We do not make an Emperor 200 but the Penguin 200 would work well for your purposes. BREX
Answered by: BREX
Date published: 2017-08-25

What is the difference between the pro series and regular series of emperor 400 

Asked by: Rhall
Packaging and graphics essentially. We have not made any changes to the Emperor Filter since 2004. BREX
Answered by: BREX
Date published: 2017-08-25

Has the Emperor 280 filter been discontinued?

Asked by: joe j
Yes, it was discontinued a couple of years ago. BREX
Answered by: BREX
Date published: 2017-09-01

My Emperor 280 needs to be replaced. I have a 30 gallon tank so the Emperor 400 seems like overkill. However, the Penguin power filters appear to be less substantial. Are there replacement impellers for the Emperor 400 or for any of the Penguins?

Asked by: Robin1
Yes, they're out there.
Answered by: glentrs
Date published: 2017-08-12

What are the dimension of the filter box length and depth? Thanks for the help and have great weekend.

Asked by: bigpop
17L X 7W X 10.5H You do the same! BREX
Answered by: BREX
Date published: 2017-10-24

I am looking for a 280 power filter. It's the only PF that will fit on the back of a 42 gal hex that is powerful enough. The rest are either too wide or too weak. Are they discontinued? Any suggestions where to find one or a replacement?

Asked by: Tidy Tank
They are indeed discontinued. You might try EBay. Otherwise we recommend the Penguin 200 or the Magnum Polishing Internal Filter. BREX
Answered by: BREX
Date published: 2017-08-10

Does the model 400 Come with activated carbon ?

Asked by: Nebe
Yes, all of our filters come with all of their media when you purchase them, and that includes activated carbon. BREX
Answered by: BREX
Date published: 2018-03-15

Is the Biowheel a part that can be bought?

Asked by: simondel1
Yes, of course! http://www.marineland.com/Products/aquarium-parts/Filtration-Products-and-Skimmers/Emperor-Parts/BIO-Wheel-Assemblies-for-Emperors.aspx BREX
Answered by: BREX
Date published: 2017-07-18
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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