Mounted Filters For Aquarium

Dear readers, I welcome you on the pages of the site In previous articles we have discussed the external and internal filters for the aquarium. However, the intermediate class remained unaffected, combining the advantages of both. This class is called mounted filters. Let’s take a closer look.


As is known, the characteristic from which the name of the internal and external filters was born is the place of their installation. It is clear that the internal filters are installed in the aquarium, and the external ones are located outside it. But there are still filters that are also located outside the aquarium, but they do not have impressive dimensions and resemble internal ones with their entire appearance. As already mentioned, such filters are called mounted.


These filters are a smaller version of the external filter. They combine filter elements and a pump in a single housing. It is installed using hooks on the side or rear wall of the aquarium from the outside, therefore it does not occupy the internal space and is practically invisible from the outside, especially if there is a background. It is completed with a tube for drawing water from an aquarium with a mesh, which prevents small fish and other inhabitants from getting inside. Some models are equipped with only one tube, which sinks to the bottom and takes water from the bottom. More advanced, however, have in the kit an additional upward tube that collects water from the surface and allows you to fight with a bacterial film. For ease of use, a flow rate regulator is located on the upper surface.

Advantages of mounted filters

What are the advantages of this class of filters:

  • High-quality filtering of various types.
  • Compactness and convenience of placement.
  • Serviceability
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High-quality filtering of various types

Mounted Filters For Aquarium

The first and most important feature of any filter. Why is the mounted type, it is at a high level. It’s all about the possibility of using different filter materials. To do this, the filter housing provides compartments for their placement. Their number usually ranges from one to three. Manufacturers usually equip such devices with sponges for mechanical filtration, however, the user is free to replace them with any others of his choice. And in this issue just mounted filters are far ahead of internal ones. Selecting a model with a sufficient size of these compartments will allow you to accommodate a decent amount of filter materials, and the number of these compartments will allow you to combine them with each other to achieve the desired result. What are various fillers used for? We talked to you in an article on filtering elements.

Mounted Filters For Aquarium

In addition, mounted filters allow low cost to organize a good level of biological filtration in an aquarium. This requires the presence of an internal filter with good performance, which will carry out mechanical filtering, and a mounted filter, filled with the necessary filler, to limit the flow rate. Water intake should be organized near the outlet of the internal filter, equipped with an aerator. Exactly where water is maximally saturated with oxygen. The truth is that the air bubbles themselves should not be placed in the intake tube, as they will make unpleasant sounds when entering the pump. In addition, this will lead to a drop in performance. When using a hinged filter as the only one in the aquarium, you should use the intake tube directed towards the bottom. This will allow more intensive mixing of water and improve mechanical filtration. When using such filters as additional, it is more reasonable to use the intake tube that collects water from the surface.

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Compactness and convenience of placement

Another positive quality of mounted filters is the small size and ease of placement. As a rule, such filters are made in the form of a flat box, which is hung outside on the edge of the aquarium, so the aquarist can afford to choose a model with the largest possible dimensions. Do not be afraid of excessive performance, since all models of this class of devices are equipped with regulators that can reduce the flow rate to almost zero. It is also obvious that the mounted filter located behind the rear wall of the aquarium, hidden from view by an opaque background, does not spoil the appearance at all, nor does it take place inside your tank, therefore it can be recommended for servicing the smallest aquariums.

Convenience cleaning

Mounted Filters For Aquarium

Another quality resulting from the placement of the filter. In order to clean the filter you do not need to put your hands in the water. The filter element is accessible from above, even without dismantling its body from the aquarium.

Disadvantages of mounted filters

Any technique has positive features combined with negative points. The task of any manufacturer is to minimize them. However, there are such negative qualities that flow from the class of the device. The mounted filters are not deprived of them:

  • Difficulty installing the cover
  • Dependence of productivity on water level
  • Noise

Difficulty installing the cover

The most basic disadvantages of filters of this design is the difficulty of combining them with a standard aquarium cover. The fact is that the filter, located on the wall of the aquarium, takes water through the tube and releases it through the spout, which bends over the edge of the glass. They interfere with the installation of the cover. The spout is often quite wide, so if you want to cover your aquarium, the cover needs to be improved by making a slot in it at the place where the filter is installed. This, however, will lead to the loss of its rigidity in the place of the notch. This nuance must be taken into account in the independent manufacture of the cover for the aquarium. It is worth noting that if you have a composition with decorations protruding from the water and a pendant lamp, installing a mounted filter will not cause difficulties.

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Dependence of productivity on water level


The increased noise of this type of filter has nothing to do with the pump noise. There are, of course, models in which, due to an unsuccessful design or poor-quality assembly, the pump noise is large, but the main source of extraneous sounds here is usually water, which, flowing over the edge of the aquarium, creates a decent gurgle. This sound is the louder the lower the water level and the higher the flow rate. In addition, these filters are often used on lidless aquariums that could muffle these sounds.

Comments on this article you can leave by using the form below. In addition, you can share your experience using these devices or talk about their features.

This concludes our discussion of mounted filters. As you understood from the article with the help of these devices it is possible to organize very high-quality filtering without large monetary investments.