Emperor® Power Filter

Product No. PF0400BD

Emperor® Power Filter is rated 3.2 out of 5 by 25.
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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.
  • Three-stage BIO-Wheel® filters for freshwater and saltwater aquariums
  • The BIO-Wheel delivers superior wet/dry biological filtration for nitrifying bacterial growth, eliminating toxic ammonia and nitrite
  • Marineland® Rite-Size™ Filter Cartridges provide mechanical and chemical filtration, screening out dirt and debris and removing odors, discoloration and impurities
  • Multi-stage filtration for a clean healthy aquatic environment
  • Certified flow rate for Emperor 400 is 400GPH
  • Use the Emperor 400 on aquariums up to 80 gallons
Rated 5 out of 5 by from Good for secondary filtration As a primary you’ll find to be less thorough than a canister. A canister provides for biological filtration and this HOB is perfect for mechanical. Easy access for maintenance. Quieter than most. Must change pads periodically bc of how good the mechanical filtration is. That being said if you use two for a 55 gal or above it’s 4 out of 5. If you use it to supplement a canister than again it’s 4 out of 5. If used by itself, only do it if you fish are low maintenance, not very messy and the tank is moderately to low stock. Don’t do if the tank is heavily stocked. 4 star imho.
Date published: 2018-06-30
Rated 5 out of 5 by from Marineland, Emperor, Eclipse System, and Penguin The ideal filter for me would be: 1. A filter that offers Mechanical, Chemical, and Biological Filtration. 2. Relatively inexpensive. 3. Easy to clean. 4. A filter that will last a long time. There are two main filter systems on the market that have been doing this for years. Both are owned by larger companies. While I like the competition's filter using a sponge to do the Biological Filtration, the Marineland Design, Emperor Power Filters, I have found to be the best due to the ease of cleaning. One does not have to take out the sponge to clean it every time they replace the filter cartridge, just leave the Bio-Wheel in. This technology is the best, and I bought my Eclipse 2 System around 1997.
Date published: 2018-06-05
Rated 1 out of 5 by from The worst, I Bought this 3 weeks and the water was never clean, I will never recommend this to no one
Date published: 2018-05-10
Rated 3 out of 5 by from BUT A MILLION STARS FOR CUSTOMER SERVICE Unfortunately, I think I received a faulty product. I called the 1-800 number to see what my options were since I purchased it off Amazon. An actual human lady picked up the phone after like 2 rings! NO PROMPTS! I explained my issues and that I didn't know what to do and *BAM!* without even submitting any receipts or serial numbers she is sending me an ENTIRE NEW UNIT. I was shocked. My LFS highly recommended these filters as they only use the Emperor 400s on all of their tanks, my son has 2 that are at least 10 years old and his fish are awesome. I really, really hope I just received a faulty one because if this new one works, I will buy everything from now on from Marineland. And the human lady's name is Sara and she ROCKS. Thank you!!
Date published: 2018-05-04
Rated 1 out of 5 by from Better filters out there We have 4 up and running as backup filters. They are high maintenance, loud, and we replace parts more than anything else. It seems like we are doing something to each filter once a week. I had really great hopes, but when these finally die, we will not be replacing them.
Date published: 2018-04-30
Rated 2 out of 5 by from Filters quickly..........however We bought our first Emperor 400 in 1999 and replaced it after about 14 years because it kept getting louder and louder even though we took it apart and cleaned it well. The new filter (same kind) is now just as noisy as it's predecessor! We have performed all of the maintenance suggestions on this site, but it has not stopped the noise. It sounds like my coffee maker when it is gurgles at the end of the brewing cycle. We highly recommended this filter to friends when we purchased the first one - however, I would hesitate doing so now
Date published: 2018-04-24
Rated 2 out of 5 by from Progressively louder I have had this filter for 8 months and it has gotten louder and louder in the past 2 months, I have never used it dry and I have cleaned it regularly I have not been too impressed.
Date published: 2018-03-18
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
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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