The Emperor 400 is an HOB aquarium filter that is powerful, efficient, quiet, and has unparalleled biological filtration with its two Bio-wheels.This filter also provides mechanical and chemical filtration through it’s 4 filter pad slots.
The Marineland is a very quiet and efficient filter, and has a very high flow rate. It can handle 400 gph, and it’s rated for tanks up to 80 gallons.
This filter features a unique two-pump design.
The first pump pulls water through the intake tube and runs it through the filter, while the second pump pulls water into the spray bar system and sprays the top of the Bio-wheels, which makes them spin through the water.
[Video] How to Set Up and Install the Marineland Emperor 400 Power Filter
The Bio-wheels are the big selling point of the Emperor 400, and for good reason. Bio-wheels are an extremely efficient way to up the biological filtration capabilities of your aquarium.
But there are some things you need to know about Bio-wheels before you jump into buying this filter.
Here’s how they work:
The Bio-wheels are made of porous material that provides a friendly habitat for beneficial bacteria to flourish.
Marineland Emperor 400 HOB Filter Bio Wheel
As the Bio-wheels spin, the bacteria comes into contact with as much of your tank water as possible. This lets the bacteria break down harmful ammonia and nitrite in the water and convert them into the less-harmful nitrate.
This means healthier fish and a better-functioning aquarium.
When you clean your power filter, it’s very important to NOT wash your Bio-wheels. Even just rinsing them with tap water will kill much of the bacteria living on them, and then you’ll be back to square one with your biological filtration.
We recommend just dropping them in the aquarium while you’re cleaning the rest of the filter.
Some owners of the Emperor 400 have reported that their Bio-wheels stop spinning after a while.
We have found that this is usually due to clogs in the spray bar system, so make sure you keep your spray bars free of debris and you shouldn’t have any problems.
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Hands On MarinelandEmperor 400 HOB Filter
This filter is made of very high-quality materials and seems to be very durable. It’s made of a black plastic material that is both heavy and flexible, and seems less brittle than the clear plastic that you’ll find in other filters.
In our time with this filter, we’ve found that it’s tough to break, doesn’t leak, and doesn’t show wear as quickly as other HOB filters out there.
Many other filters out there have intake tubes that are too short, but the intake on this Marineland Pro Series Bio-Wheel Power Filter is very long. That means you can put your intake all the way at the bottom of your tank.
There is also a second intake in the middle of the intake tube, which helps prevent dead zones and ensures that all of your tank water is getting pumped into the filtration system.
The four filter pad slots are a bonus, and you can easily swap out the included foam pads with bags of activated carbon or other filtration media if you prefer.
Buy The MarinelandEmperor 400 Power Filter
Crystal clear water and healthy fish are a hallmark of this Marineland Power Filter. The high flow rate, efficient filtration, and dual Bio-wheels combine to make this one of the best filters on the market.
Jack Dempsey has over 20 years of experience with freshwater aquariums, his goal is to help beginners avoid the biggest mistakes when getting started. If you find something helpful please share it on your favourite social network. If you need help with anything send Jack a question.