Eheim Classic 250 Review : Budget-Friendly 66-Gal Canister Filter

By | July 16, 2018

When trying to find the best canister filter in the market, a simple online research will easily lead you to Eheim. The brand is trusted by so many aquarium owners around the world. In this Eheim Classic 250 review, we will discuss about a canister filter for aquariums up to 66 US Gallons. Is it the right one for you?

Continue reading below to learn more about:
– The design and build quality of Eheim Classic 250
– The installation process of the unit
– The capacity of the filter
– The performance of Eheim Classic 250 in cleaning an aquarium
– The maintenance requirements of the unit
– The recommendation to buy or not to buy Eheim Classic 250

Perhaps the first thing that you will like about Eheim Classic 250 is the build quality. We can’t really say that it is space-friendly because, well, it is quite bulky. With a diameter of 16 cm and an installation height of 180 cm, the canister filter is pretty big. However, this becomes less of a problem because, as a canister filter, it is designed to be installed outside the aquarium. See also: Fluval FX6 vs Eheim 2080.

The only parts that will be inside the aquarium are the intake and outtake tubes, so it won’t reduce the available space for your fish. However, the build quality is impressive. The housing of Eheim Classic 250 is very sturdy and durable. Of course, one of the reasons why many people prefer canister filters is their strong durability.

The clamps are made from stainless steel, and are very strong. They are certainly much better than the plastic clamps that are more commonly found on other filters. While the filter is turned on, the clamps effectively keep the motor head in place. This is to prevent the unit from making any movement when working. The stainless steel clamps don’t get loose over time, so it is unlikely that they will develop issues.

Interestingly, Eheim Classic 250 has received mixed reviews regarding its installation process. Some people say that it is easy and intuitive, while some others say that it is difficult and complex. This is actually a matter of experience. If you are already familiar with classic canister filters, you probably will not find any trouble in installing Eheim Classic 250 at all. However, things are different if you are a beginner who has never used a classic canister filter before.

The included manual does provide the necessary instructions for the installation. However, the diagrams are not very clear. As the effect, you may get confused in determining where the parts need to go, especially if you are doing it all alone without any prior experience. Hence, working with an experienced friend is a great idea. You may also want to watch one or two tutorial vids on YouTube before installing the unit.

Once you’ve figured out where you need to put the parts, things become a lot easier. But you still need to be careful when priming. Otherwise, you may end up spilling a lot of water on the floor.

The next cool thing about Eheim Classic 250 is the capacity. It is fairly high. According to the manufacturer, this particular model is suitable for aquariums of up to 66 US Gallons, which is roughly equal to 250 liters (to be more precise, 249.837 liters). Other filters that can filter that much water are mostly larger and bulkier.

Some users say that Eheim Classic 250 is better suited for aquariums of up to 40 or 50 US Gallons. However, this actually depends on the bio load of your aquarium. Eheim Classic 250 probably will struggle with a 66-gal aquarium with lots of plants and fish. However, Eheim Classic 250 can easily handle a 66-gal aquarium if there isn’t too much bio load.

Filtration Performance
A good filter is supposed to have all of the three major filtration types, which are mechanical, chemical, and biological. Eheim Classic 250 comes with very clear instructions about how to use the media baskets, so setting up the mechanical, chemical, and biological filters is a breeze.

The design of the baskets allows you to easily stack multiple filtration media. You can mix things up and even add other media into the canister if necessary.

The performance is really great. Eheim Classic 250 can take care of solid debris, nitrites, nitrates, ammonia, colors, and odors very well. When testing it on a fairly large aquarium (there aren’t too many plants and fish, though), the output water is crystal-clear.

The flow rate and efficiency are also great. Eheim Classic 250 has been designed to provide high flow rate while consuming relatively low energy. The flow rate is just as good as the specifications. If you notice a significant decrease in the flow rate, you probably need to clean the filtration media.

Interestingly, Eheim Classic 250 works very quietly. Even if you put the filter right beside your bed, it will not reduce your sleep quality. There is virtually no sound at all coming out of it when it is actually running! Many other canister filters are noisy, so this is a big advantage.

The maintenance of Eheim Classic 250 is easy and straightforward, thanks to the quick-connect valves. Attaching and detaching the valves are a very easy. This minimizes the time and effort needed for the maintenance, not to mention that it makes the process less messy.

Keep in mind that you only need to do very little cleaning to maintain the filter. You should not disturb the healthy bacteria growing in some of the media, such as the coco puffs, because they are vital for the cleaning process. They capture chemicals and waste from the water. There are only a few pieces that you need to clean, which are the white tubes. The cottony layer on the top needs to be replaced if it starts to restrict the water flow.

- Permo-elastic silicon sealing ring fixed on the pump head for easy and safe closing after cleaning - Equipped with filter sponges and/or loose filter media - Accessories included: spray bar, inlet pipe, hose and installation accessories - Comes complete with filter media (EHEIM Mech & Substrat Pro) and valves

If your aquarium is under 50 US Gallons, Eheim Classic 250 is a great choice. It is also great for an aquarium of 66 US Gallons if the bio load isn’t very high. The performance is great. It has excellent filtration quality and flow rate, and it works quietly.

Eheim Classic 250 Review: Specifications
Aquarium size 80 L – 250 L
Pump power per hour(50 Hz) 440 L
Container volume 3.50 L
Filter volume 3.00 L
Height 355.00 mm
Installation height 180.00 cm
Pump head (maximum height at 50 Hz) 1.50 m
Diameter 160.00 mm
Voltage 230 volt
Power (50 Hz) Up to 8 Watt
Standard power plug EUR
Hose diameter 12.00 mm /16.00 mm
Sea water yes
Freshwater yes
For outdoor use no
Packing dimensions(Height) 37.00 cm
Packing dimensions(Width) 22.00 cm
Packing dimensions(Depth) 16.00 cm

Eheim Classic 250 Review: Pros
– The set-up is relatively easy
– Quiet operation
– Powerful filtration for fishes that aren’t too messy
– Easy maintenance
– Competitive pricing

Eheim Classic 250 Review: Price
Get the best price for Eheim Classic 250 here!

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