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Marineland Power Filter: Emperor 400 vs. Emperor Pro 450

Marineland recently released the Emperor Pro 450 Power Filter. So how does this new version compare against the older Emperor 400? You can find out in this versus guide.

Quick Summary

Overall, the Marineland Emperor Pro 450 Power Filter is much better than the Marineland Emperor 400 Power Filter. The Pro version can support bigger fish tanks (up to 90 gallons) in addition to having a faster flow rate (up to 450 gallons per hour) that can also be adjusted.

The 450 also comes with more surface area for beneficial bacteria to grow on as well as an extra media basket for additional filtration. Last but not least, the telescopic extension tube also gives you more customization options when it comes to changing the length of the intake tubing.

If you are interested, you can purchase either of the two products on Amazon with the following links:

Emperor 400 Power Filter vs. Emperor Pro 450 Power Filter Comparison Chart

 Marineland Emperor 400Marineland Emperor Pro 450
Aquarium TypeFreshwater

Saltwater

Brackish Water
Freshwater

Saltwater

Brackish Water
Supported Aquarium SizeUp to 80 gallonsUp to 90 gallons
Rite-Size Filter Cartridge EE
Water Flow RateUp to 400 gallons of water per hourUp to 450 gallons of water per hour
Included Filter Media2x Penguin Power Filter Cartridges

2x Bio Wheels
2x Penguin Power Filter Cartridges

2x Bio Wheels (with 10% more surface area)
Optional Filter MediaMarineland 2-in-1 Biofoam Pre-Filter

Marineland Ammonia Reducing Resin

Marineland Black Diamond Carbon

Marineland Ceramic Rings

Marineland K2 Biological Media
Marineland 2-in-1 Biofoam Pre-Filter

Marineland Ammonia Reducing Resin

Marineland Black Diamond Carbon

Marineland Ceramic Rings

Marineland K2 Biological Media

Marineland Penguin Micron Filter
Extra Media Cartridges 2x2x
Extra Media BasketNone1x
Hinged Lid Top?NoYes
Spray Bars?YesYes
Adjustable Flow Dial?NoYes
Intake Extender?Non-adjustable extension tubeAdjustable, telescopic extension tube
Mid-Level Intake Strainer?YesYes
Submerged Pump?NoYes
PricingCheck price on Amazon.Check price on Amazon.

Aquarium Type

Both the Emperor 400 and Emperor Pro 450 can be used for Freshwater, Saltwater or Brackish Water fish tanks.

Supported Aquarium Size

The Marineland Emperor 400 hang-on-back filter has been rated for aquariums that can hold up to 80 gallons of water. The Marineland Emperor Pro 450 hang-on-back filter is rated for tanks that can hold up to 90 gallons of water.

Rite-Size Filter Cartridge

Both the Emperor 400 and Emperor Pro 450 HOB filters use the E Rite-Size Filter Cartridge, which measures at 9 1/2 inches by 6 inches.

Water Flow Rate

The Marineland Emperor Pro 450 has the advantage when it comes to water flow. At the maximum, the 450 can move 450 gallons of water per hour. That rate is 12.5% more than the Marineland Emperor 400, which can move water at 400 gallons per hour.

The Marineland Emperor Pro 450 Power Filter on Amazon.

Included Filter Media

Both products come with all you need to get started as you will get biological, chemical and mechanical filtrations.

The two included Penguin Power Filter Cartridges feature poly-fiber on one side to provide mechanical filtration. As water pass through the media, the fish wastes and other particles will be filtered out. So your aquarium should look a lot cleaner.

The other side of the cartridges is made for chemical filtration as it contains activated carbon. This type of media have microscopic pores that will get rid of any odor, discolorations, medicine, and/or heavy metals from your aquarium.

For biological filtration, both filters use two bio wheels (although the wheels used by the Emperor Pro 450 have 10% more surface area, according to Marineland). The wheels are designed to provide surface area as well as plenty of oxygen for beneficial bacteria to grow and thrive. You will need these bacteria as they consume ammonia and nitrites, both of which will otherwise be harmful to your fish.

Optional Filter Media

The Emperor 400 and Emperor Pro 450 also support many of the same optional filter media types. You can find the list of products below:

  • Marineland 2-in-1 Biofoam Pre-Filter
  • Marineland Ammonia Reducing Resin
  • Marineland Black Diamond Carbon
  • Marineland Ceramic Rings
  • Marineland K2 Biological Media

The Emperor Pro 450 is the only one of the two power filters in this comparison guide that can use the Marineland Penguin Micron Filter, however.

To find out more information of the aforementioned filter media types, you can check out this buyer’s guide.

Extra Media Cartridges

Both filters come with two extra media cartridges. These containers are empty, giving you the option to add additional filtration such as the aforementioned compatible filter media types.

Extra Media Basket

The Emperor Pro 450 also include an extra media basket, which will give you even more space to add additional filtration. You can also remove the basket and then replace it with the aforementioned Marineland K2 Biological Media.

Hinged Lid Top

The Marineland Emperor Pro 450 comes with a hinged lid top, making it easier to open and close.

The Marineland Emperor 400 does not; so it will be a little bit more cumbersome when trying to clean out this power filter as you need to find a place to put the top covers.

Spray Bars

Both of these HOB filters come with spray bras. These parts are used to keep the wheels churning, which will keep your beneficial bacteria alive in addition to helping to oxygenate the water in your fish tank.

The Marineland Emperor 400 Power Filter on Amazon.

Adjustable Flow Dial

Only the Emperor Pro 450 has an adjustable flow dial, which allows you to change how much the water is being moved in your fish tank. This feature is extremely helpful if you are keeping fish species that prefer slower water movements.

The Emperor 400 does not have any similar feature. As a result, it will be operating at the same 400 gallons per hour flow rate.

Intake Extender

While both power filters come with an intake extender, the one that comes with the Emperor Pro 450 is vastly superior. Due to its telescopic design, you will be able to further adjust the length of the intake extender in order to match your preferences.

The extender that is included with the Emperor 400 can’t be further extended. Therefore, you have less customization options when it comes to the length of the intake.

Mid-Level Intake Strainer

Both products do come with a mid-level intake strainer. When used, this optional part will let your filter suck in water from your fish tank at a higher water level in addition to the water coming in from the bottom intake strainer. This is helpful if you have a tall tank with fish occupying both the higher and lower water levels.

Submerged Pump

Only the Marineland Emperor Pro 450 has a submerged pump. By being underwater when installed, the pump will make a lot less noise (less than 40 decibels, according to the manufacturer) when compared to the Marineland Emperor 400.

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