If you have tried to search for the best external canister filter online, the chances that the Eheim model will pop up are quite high.
This model in particular gets quite the buzz among the most aquarium enthusiasts. They would be talking about Eheim as a great model that will always get the job done and still in a short time.
According to many users, they are quite happy with the overall functionality of the filter. Such great news about the filter gets the model quite lovable among any aquarium owner.
To help you understand more about what you will be buying, you should continue reading these reviews.
Table of Contents
EHEIM Classic External Canister Filter Review
Design and Construction
You will be happy to learn that the classic models often have a solid and sturdy build all the time. Having such type of construction is what keeps the models to be among the favorites of many people.
It is not just about a few parts being high quality, all the parts are made to meet the standard needs the customers might have on filters.
The clamps are also made of stainless steel. These clamps help to lock the motorhead in a position to avoid wobbling when the motor is running.
So, instead of having to use the big plastic clamps like those found in other filters, you use more durable stainless steel clamps.
The Setup Process
Most manufacturers would try to ensure that their canister filters are easy to set up and mount to the aquarium. It is what you get with this model when buying it. If you have assembled one before, it should be quite straightforward for you to do it.
Newbies to this canister will have a small challenge if they choose to follow the instructions in the manual. The manufacturer does not present clear diagrams and instructions in the manual. You can always consider checking out videos online to learn more about the mounting process.
High Flow Rate
The motor will be needed in this part of the filtration process. You should be in a position to get the best flow rate when using this model.
The filter is made to be energy efficient so that it can consume less power and still deliver a high flow rate. Most users have claimed to get the best flow rate just as advertised by the manufacturer.
Most of the time, the other models would only give you 50 percent of what the manufacturer had advertised with the product.
Impressive Capacity
These classic filter models have quite an impressive capacity depending on the model you end up with. The models have a capacity ranging from 40 gallons to about 300 gallons as the highest.
You simply need to check out the different models and decide which one would work great for you before making up your mind.

Low Noise Levels
Just like any other canister filter with a motor, the users are always concerned about the amount of noise they are likely to experience. You will be happy to use this model, as its operation is silent.
Sometimes you might not even know that the canister is working until you get close to it. Not many canisters on the market today can beat its low level of operating noise.
The Filtration Process
You might have been used to see the 3 media baskets, this one is quite different. The Eheim classic models will still have the mechanical, chemical, and biological filtration, but done differently. Its filtration is done with a Substrat Pro media and Eheim Mech important for trapping the larger debris and dispersing water.
With the filtration media of such type in the canister, it will not be easy for any dirt, debris, or contamination to get around it. You can buy it knowing it is an amazing filter, which will always get the job done at all times.
Cleaning Process
You might have a few challenges cleaning the filter for the first time. The trick is to make sure that you follow the manual on how to do it.
The manual will give you the right process to follow when it comes to un-mounting, cleaning, and then mount the canister once you care done with the cleaning.
Pros
- It offers a very silent operation
- It does not often leak even when used for a long time
- The installation process is easy
- It is very effective in water filtration
- It has a low energy consumption
Cons
- Getting the replacement parts is hard
- The ceramic impeller is prone to breaking
Verdict
If you have been reading carefully, it is easy to note what stands for this model is the filtration media and the very silent operation.
If they are the things you need in a canister filter, then you should be in a position to enjoy it fully. Get it today for amazing filtration capabilities.
An excellent review, but it is NOT the impeller that is ceramic but the impeller SHAFT that is ceramic, and as for spares, unless you live in outer Mongolia the spares are available all over the internet, just look around and most dealers keep a large variety of spares in stock.