Polar Aurora Free Media 4-Stage External Canister Filter Review

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Quick Overview


  • Affordable
  • Amazing performance
  • No loud noises


  • Might cause leaks on the floor, which requires immediate reaction

Large-capacity canister filters are a great way to enhance aquarium filtration. If you already own an aquarium, you probably know that they represent a closed system that accumulates waste and converts it into various by-products, which can be fatal to your fish.

However, with the right aquarium filter, you can be sure that you will always have clean and clear water that your fish will enjoy.

A filter might take up to two days to completely clean all the impurity and dirt from the aquarium. One of the best filters for this is the Polar Aurora Canister Filter. Let’s see what it has on offer.


Polar Aurora Free Media 4-Stage External Canister Filter Review

This filter is one of the best external canister filters found on the market today. In terms of the ratio of price to quality, it provides everything an aquarium owner could want.

This product is not a simple filter for a simple, small aquarium; this one is used to filter water in aquariums with a capacity of up to 200 gallons.

Who is this product for?

This product is for people who own big aquariums up to 200 gallons (750 liters) of water. Although it can be used for home aquariums, it is ideal for big aquariums like those found in zoos and pet shops.

The fact is that when there are many fish in the aquarium, they produce a high amount of waste, so therefore a good filter is needed to keep the water clean. When it comes to the price, it is quite affordable.

What’s included?

The package includes an input and output discreteness, two 5-feet lengths of flexible tubing, a barrel head, the main canister body, 9W UV light bulb, input and output curvy bar, four draining trays and a tray cover, two spray bars, three input bars, and a few other necessary items.

Since there are many pieces, the seller mentions that if any piece is missing, all you have to do is contact them by email, and they will send the missing parts immediately.

Overview of features

This external canister filter is not among the best for no reason. It comes with a few great features that should be mentioned.

First, let’s note that it is suitable for large fish tanks and has a maximum flow rate of 525 GPH from its built-in pump, which is excellent. Also, it has four media trays that are capable of handling any choice of filtration media.

It also comes with an adjustable spray bar, which is a beneficial feature for adjusting the output flow from the filter. The convenient pump also eliminates the need for manual siphoning.

The four flexible trays that come with the product allow you to add other filtration media, like SunSun’s activated carbons and various types of ceramic rings. It helps achieve exceptional filtration, in mechanical, chemical, and biological terms.

How to set up the canister filter

  1. First, you should locate a decent spot for the canister filter, which should be somewhere beneath the aquarium. Then, you need to prepare the filter by taking off the motor head to ensure that all the media containers are inside.
  2. Next, you need to install the mechanical items. These should be set up in the filter’s first tray, because after the filter draws water directly from the fish tank, the water will then flow from the filter’s first tray and will be forced to flow through all the other layers. This will lead to better filtration.
  3. Then you should install the biological media to the filter’s second plate right at the base. After that, you need to install the chemical media in the third and fourth layers.
  4. Next, attach the connector to the fish tank and connect your hose to the intake valve. Then run the hosing to the fish tank and cut the hose to the required length.
  5. Then you need to prepare the output, which is almost the same as preparing the intake. Set up the fish tank connector, attach a hose to the filter, and move the hose to a tank. All that is left is to start your filter, and that’s it!


If you don’t like this canister filter, you should consider any other filter made by Polar Aurora. They come from one of the best manufacturers on the market, and you should be able to find just what you are looking for.


As you might have noticed, this canister filter is one of the best, if not the best solution to everyone who owns a large aquarium. It offers excellent features at a very reasonable price, so you should consider getting one for your aquarium.

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