For aquarium

Internal filter for aquarium


Internal aquarium filters: in search of the best

Going to buy a filter for cleaning aquarium water, you need to imagine which device is more suitable in each specific case: external or internal, with high capacity or low, expensive or cheap. A large number of aquarists stop in their choice on internal cleaners. There are a lot of models of such filters, and often the question arises, which of them should be chosen.

Internal water filters are very popular in the aquarists society. They have:

  • small dimensions;
  • installed directly in the tank;
  • quite easy to operate and maintain.

There are a lot of similar devices on the pet supplies market, and there is clearly not enough time for a careful reading of the instructions for each sample. In order to immediately make the right choice, you need to have an idea of ​​what filters manufacturers offer, what are their differences, advantages and disadvantages.

Device and principle of operation

Internal water purifiers have a fairly simple device. Each of them is a cylindrical housing with slots for drawing in water, to which a small pump is attached.

Inside the case is one or more filter materials. In the simplest form, this material is foam rubber (flexible polyurethane foam).

Water, passing under pressure through the foam cells, gets rid of mechanical impurities and goes back to the aquarium. Colonies of saprophytes (microorganisms that accumulate in the cells of foam rubber) produce biological purification of aqua, turning decomposed organic residues into inorganic substances.

In appearance, the device looks like a glass. That is what the owners of ornamental fish often call it.

Types of aquarium internal filters

Devices can be divided by filtering capabilities. The simplest glasses carry out only mechanical cleaning of water and partially biological. Accordingly, they are the cheapest.

In some models, the number of sections for the installation of filter material is increased, which also allows for chemical treatment of water using activated carbon or zeolite.

Internal filters also differ in their performance, that is, in the volume of water that is pumped through the system per unit of time. Immediately it should be noted that the 300-liter capacity is the principal limit for the technical devices under consideration.

As a rule, the pump on the internal cleaner is mounted on top of the glass, but there are models where it is located below.

There are modern devices that have additional options, for example:

  • built-in water heater to maintain the temperature in the aquarium;
  • an injector for supplying air with water;
  • regulator and pump power indicator;
  • flow direction switch and others.

Of course, accessories and options affect the price of the device.

Which filter is better?

Perhaps no one aquarist can give a clear answer to this question. There are quite a few models on the market that have been successfully operated for a long period.


If we consider the problem from the point of view of the price for the device, then among the domestic cleaners of economy class it is possible to distinguish products of the German company Sera.

Cheap devices of this brand L30, L60, L120, L150 and even L300 are easy to use and reliable. The numbers indicate the volume of the aquarium for which they are intended.


Italian devices of the Fluval brand are long-lived in the market of aquarium accessories. The best-selling device in the Italian model range is the Fluval4 Plus. He has a strong pump, power flow indicator and a modern, memorable design.

However, this model has relatively large dimensions, and its filter elements quickly become clogged. According to the declared design features, the filter cartridge can be changed without stopping the operation of the device and without removing it from the water.

But in fact, in the course of this operation, some of the garbage goes back into the water anyway. It is better to temporarily turn off the device and quietly change the cartridge.

AquaEl FAN

Domestic AquaEl FAN Polish aquarium cleaners have become very popular. And completely justified. Having low power consumption with a relatively powerful pump, Polish devices are reliable, simple, effective.

They compare favorably with their Chinese and some European counterparts with an original filtering material (a phenol-free sponge) on which bacteria actively settle, providing high-quality processing of organic residues and nitrogen compounds.

According to aquarists, AquaEl FAN has only one drawback - an increased level of noise during work with aeration.


The internal filtering devices of the Eheim brand can be called the elite of this type of devices. Designers of the German company Eheim GmbH & Co meticulously and with fiction approached the problem of creating a unified filter.

For example, the model Eheim 2212 AquaBall has the original device of the outlet. Like a joystick, it can be rotated to either side with a ball design. This is very convenient, since the flow of water and air bubbles can even be directed downwards.

The devices are virtually silent, the filter sections in the glass can be swapped, regular bio-fillers do an excellent job with their biological cleaning function.

The considered devices, which are the most expensive in their class, have only one drawback - the axis of the pump impeller is ceramic (in all other models it is metal). Therefore, special care must be taken when disassembling and maintaining such a filter.

A variety of filters for aqua, working inside the aquarium, great. Which one is better? Perhaps one that satisfies the requirements of reliability, functionality, efficiency and is suitable for an aquarium of a particular tank.

The best filter for aquarium: types of filtering, photo-video review

Good filter for the aquarium Which is better to choose?

As a rule, such a question arises from a conscious aquarist before purchasing and choosing a filtration system for your water body. Of course, it is possible to let everything take its course, as many do - go and buy a filter in the pet store, which is available and offered by the sellers. But, only then do not have to complain about the sellers and regret their wasted money. Sellers have such a job - to sell the product and it doesn’t matter your fate and the fate of your filter.

Glad you looked at this page! This means that you approach this issue correctly - first read, learn, and then make a decision. After all, this approach to the business level almost all the risks of acquiring a not-good aquarium filter.

In this article, we will not tell you in detail and boringly the details of the various aquarium water filtration processes, but try to focus on the quality characteristics of the filter and the nuances of its choice, to give advice. To the same readers who are looking for where to buy a good filter for an aquarium, at a reasonable price, we recommend you pay attention to the time-tested aquarium shop ReefTime.ruthere is just a huge selection of filters. From recommendations we suggest to pay attention to a line of filters from Hydordetails of which are written here!

So, before choosing a filter, you must understand, and which filter is good for your aquarium ?! For this you need to think about what fish, what plants will live in your pond, how many will be. If the aquarium is large, there will be a large number of large fish swimming in it, there will be a lot of plants, then the filter should cope with this and most effectively remove all "sewage" from the aquarium water. But, if it is a small aquarium, and you are not going to breed “sharks” in it, then I personally do not see the point of taking a powerful filter filter, you can do with a “standard” filter and thus save a considerable amount of money.

I think everything is clear here, so let's move on to the next question.

Before buying an aquarium filter, you need to find out what filtering mechanism is used in it.






Let's briefly review the principles of each filter with a specific type of water filtration.

Mechanical filters and aquarium filtration

- These are the simplest and at the same time effective filters for an aquarium. Some "old fashioned" call them "glasses." The essence of their work is very simple - the filter has a pump (motor) and an absorbent sponge. The pump pumps the aquarium water, which passes through the sponge, is cleaned. Such filtration effectively copes with the removal of large contaminants: food residues, fish excreta, residues of dead organisms, etc.

If you have a small aquarium and not very large fish swim in it, such a mechanical filter will be quite enough.

Chemical filters and aquarium filtration

- These are filters that provide filtering through various absorbents. The most common absorbent is aquarium coal. Also in the aquarium used and other absorbents - ion exchange resins, for example, zeolite. Filters that provide for the possibility of such filtering are more practical than mechanical ones. Since the pores of absorbent materials are able to absorb smaller particles of pollution of aquarium water, and ion exchange resins can effectively fight even the most harmful poisons - ammonia, nitrite and nitrate, which are formed and gradually accumulate in the aquarium.

Biofilters filters and aquarium biological filtration

- Perhaps this is the most valuable filtering for the aquarium. Its essence lies in the presence of a special compartment in the filter for breeding a colony of "beneficial" bacteria, which multiply on a special substrate, for example, ceramics. These bacteria are important and very useful hydrobionts of any aquarium. They are involved in the denitrification process, to put it simply - they feed and decompose ammonia, nitrites and nitrates to a gaseous state. And, as many people know, NO2NO3 are the worst enemies of the aquarium inhabitants, in most cases they are the root cause of the fish disease.

Combined filters and aquarium filtration

- These are filters that combine the possibility of using various types of filtration of aquarium water. Some filters have all three of the above filtering types. But it is worth noting that even the simplest mechanical filter can be used as a combined one. That is, use in it and absorbent sponge, and for example aquarium coal.

photo mechanical aquarium filter

left and right

photo biofilter aquarium combined

So let's summarize the above. If you have a small pond and not very big fish, then your choice is a mechanical filter. Such filters are not expensive, easy to operate and clean. But, if you have a large aquarium, large fish or just a lot of them, then our recommendation for you is to choose a combined filter with the presence of biofiltration. Such a filter is more expensive, more difficult to clean, but it will serve you well.

For those who still want to do mathematics or want to make an aquarium filter on their own, here is the formula for calculating the power of the aquarium filter

Buying a good aquarium filter, you should also pay attention to its technical characteristics. In a word on power. The power of the filter is determined by its ability to pass a certain amount of water for a certain period of time. Usually 300l./hour is written on the filter pack, 1000l./hour - pay attention to this.

If you do not want to bother with the calculation of the required filter bandwidth, then you can simply look at the recommended aquarium volumes for this filter, which are written by the manufacturers on the packaging, for example, "designed for a volume of 150l.". However, this figure is not always true.

Therefore, we advise you to take the filter with the mark "recommended volume" much higher.

A rather important technical characteristic of the filter is its "noise". Good aquarium filters are noisy, but quiet. Agree, I would not like to hear the roar of the engine from the aquarium at night, as if "a flock of night bikers travels around your bed." If possible, do not take Chinese aquarium filters or filters of unclear brands. Trademarks that have proven themselves in the market, try to make their products high-quality and silent, but such filters are much more expensive than Chinese. It is very difficult to recommend you a particular firm - there are many of them, and they are not always “branded”. But, based on my own experience, I dare to draw your attention to the TM "AquaEL" - a combination of price and quality.

There is still a small aspect of the technical part of the aquarium filter - this is its assembly and disassembly and accessories. Some filters, even mechanical ones, are equipped with two containers, some with one, some are equipped with additional nozzles for aeration and other gadgets, others are not. Some are easy to disassemble and clean, others are difficult. Therefore, choosing the best aquarium filter in the store, at least turn it in your hands, look at the accessories, think about whether you need them or not.

Now let's consider the issue of choosing an aquarium filter based on its location.





Internal aquarium filters

- fasten and work inside the aquarium. They can be of all types of filtration, that is, mechanical, chemical, biological and combined.

Perhaps these are the most popular and best-selling filters. Their price is much cheaper than external filters, easy to operate and clean. As a drawback, some aquarists point out that they occupy space in the aquarium - thereby eating up precious volumes. However, this is a controversial point, because the filter does not occupy 1/3 of the aquarium. Well, yes, it takes 2-3 liters of volume, hanging quietly in the corner. It seems to me that this is not a very significant drawback, especially for medium and large aquariums.

External aquarium filters

- these are filters that are located and installed outside the aquarium, only the tubes are lowered into the aquarium. It is difficult to give a positive or negative assessment of such a filter - someone is happy with it, some is not. Therefore, I will simply list the advantages and disadvantages:


- a large amount of filter materials, thereby achieving maximum water purification;

- combined filtration with purity levels;


- high price;

- This is a huge "bucket" near the aquarium;

- there is always the likelihood of a flood (as a rule, when improperly assembled);

Mounted aquarium filters

- This is a compromise between the internal and external filter. The hybrid of both is "hanging from the outside, but working inside." These filters are not so popular among aquarists, because they work according to the principle “not yours is not yours,” perhaps its only distinguishing advantage is compactness and space preservation both in and under the aquarium.

So, summing up the above, we can recommend internal filters for small, medium and not very large aquariums (up to 200 liters). For large aquariums, external aquarium filters will be good. Of course, this statement is relative, because no one has yet canceled individual aspects and wishes.

Concluding this article, I would like to note that there are other methods, mechanisms for filtering aquarium water, such as the bottom filter or "false". Such methods are less popular and have a number of advantages and disadvantages. In the future, if necessary, you can make them yourself.

I want to believe that this article has helped you determine the choice of the best aquarium filter. But, remember that no even the coolest filter will not replace the banal weekly replacement of aquarium water.


Filters for the aquarium: which one is better

A filter is a device for purifying (filtering) any medium. Accordingly, the aquarium filter is designed to clean the water in the house for fish. Like any other device, filters for aquariums are of different types. When buying, it is important to immediately select the device that is really suitable for this aquarium.

Why do I need cleaning?

The aquatic environment in the home water is always required to filter. This is an axiom that does not require proof. If in nature, running water is filtered naturally, then a fixed aquarium environment must be cleaned forcibly.

On this depends the normal existence of ornamental fish and aquarium plants. Ideally, an aquarium cleaner should:

  • be small;
  • обладать высокой надёжностью, простотой в обслуживании;
  • а эффективность его работы должна соответствовать объёму очищаемой воды.
Каждый такой прибор работает по одинаковому принципу: забор воды-очистка-выпуск воды.

Types of Aquarium Filters

By their constructive arrangement, filtering devices for aquariums can be:

  • external;
  • internal;
  • mounted;
  • bottom.

Internal filter device

Located directly in the tank, is perhaps the most popular in the home aquarium.

Such filters are the cheapest and easiest to use. The only drawback - they occupy a useful volume of aquarium space.


Some aquarium owners prefer external filters. The device itself (aquarists call it a bucket) is located on the outside next to the tank, and two tubes are put into the aquatic environment to pump out the dirty water and pump clean after filtration.

The advantage of such devices is their high performance. In addition, they do not occupy a useful place inside the aquarium. Disadvantages: relative high cost and large dimensions.

Mounted aquarium filters

This is a compromise when the device is attached to the wall of the aquarium, and the filter element is located in the water. However, such devices are not very popular.


A very interesting type of filters for the aquarium. Another name for the bottom filter is counterfeit. In this device, a flat filter element (plate) is laid on the bottom of the aquarium and is covered with soil on top.

Water purification goes from the bottom up, and the water passes a double purification: not only through the filter element, but also through a layer of soil. The disadvantages of such devices is their low productivity and complexity in maintenance. In large aquariums, they are usually not used.

Types of filter elements

Aquarium water filtration itself is

  • mechanical (separation of small debris particles)
  • biochemical (neutralization of harmful impurities and substances).

Such problems are designed to solve filter materials in the aquatic environment.

Sponge filter

The most common filtering element is a special sponge, fine and porous. Water, forcibly passing through the pores of the sponge, leaves mechanical debris in it (remnants of food, plants, and other foreign substances).

Approximately in 6-7 days of work, colonies of beneficial bacteria are formed on the sponge, which carry out biological treatment (for example, from excess nitrates and generated methane). Such sponges should be cleaned of accumulated debris after about 2 weeks of operation. The exact timing of cleaning and its order must be indicated in the filter's instruction manual.

Activated carbon

Another type of filter filler is activated carbon. Due to its chemical properties, it purifies water more qualitatively.

But with such filters you need to be extremely careful: with the full saturation of activated carbon with harmful impurities, it spontaneously produces their release into the environment. This phenomenon can in the worst case even lead to the death of the inhabitants of the aquarium. Experienced aquarists do not recommend using such aquarium cleaners.

Multipore ceramic bio fillings

Get more widespread. This may be special ceramic balls. Beneficial bacteria quickly settle on such a surface, creating large colonies.

The effectiveness of biological treatment of the aquatic environment increases many times. Naturally, such filter elements are used in conjunction with mechanical cleaning filters.

What device to buy? Criterias of choice

All commercially available aquarium filters perform their functions well. What brand of device to give their preference? An exact and unequivocal answer to this question is difficult to obtain.

If the aquarium is large enough, you can purchase an internal filter. So, internal filters are well established. Aquael fan Polish production. They are easy to install, reliable, with excellent filtering. In addition, such devices additionally produce and aeration of water.

Products of the German company are in good demand. Eheim. The line of silent filters of this manufacturer is designed for aquariums of any capacity.

If you want to save the internal space of the aquarium, the external filter is the best option. It must be understood, however, that such a filter is an expensive pleasure.

According to a number of aquarists, Polish external devices Aquael UNIMAX represent the optimal combination of quality, efficiency and price.

German company external filters Tetra developed using the latest technology of bio-purification of water. They work reliably without changing filter elements for at least 6 months.

Many aquarists who prefer bottom filters use Chinese-made devices from the company. HAILEA. Prices for such filters are quite reasonable, but their maintenance requires more time.

Thus, the criteria for choosing a filter are: the volume of the aquarium, the price, simplicity and reliability of the device. In any case, before buying an aquarium filter it is better to consult with experienced owners of ornamental fish.

Internal filter for aquarium

A variety of internal filters in our stores recently pleasantly pleased. Along with this, lovers of aquarium fish have a question, which filter is better? The choice of filter depends on the size of the aquarium, and on the number and sensitivity of the fish living in it. Quite often, internal filters are used to clean the water in aquariums. They are simple and versatile.

Main functions:

  • mechanical filtration;
  • biological filtration;
  • water circulation;
  • aeration.

The design of the internal filter for the aquarium is quite simple. The filter itself is small, consists of a pump with a foam sponge and a pump. If the sponge is very clogged and cannot be cleaned, it can be replaced. The pump is an electric motor, in which the fixed winding is hidden in a sealed enclosure, which prevents water from entering the pump.

In general, all internal filters for an aquarium are arranged according to the same principle: at the top of the device there is a pump that pumps water through the filtering material, cleaning it of dirt and saturating it with oxygen.

Choosing an internal filter for an aquarium

Before you buy a filter, you need to pay attention to the power of its compressor and filter material. The larger the volume of the aquarium, the more powerful the compressor should be, typically up to 1200 liters per hour. Most often, a foam sponge is used as a filtrate, in some filters there is a compartment in which you can put special fillers in the form of sand, stone, etc. The volume of filter material - up to 700 sq. Cm.

The most important criterion when choosing an internal filter is the volume of the aquarium itself, it should not exceed 180 liters, the limit is 200 liters. Also, when choosing an internal filter for an aquarium, you need to remember that if this type of filter can provide water purification in an aquarium with a large volume of water, then its dimensions will be too large. In this case, it is worth choosing a different type of filter.

Installing the internal filter in the aquarium

This is not such a laborious process. It is enough to fix the filter on the side or back wall of the aquarium with the help of suction cups, in an inconspicuous and convenient place. filter in the aquarium horizontally to the bottom, directing the stream upwards.

In order not to waste money, some amateurs prefer to install homemade internal filters in the aquarium. The advantages of this design are: low price; free choice of fillers; universal design, etc. But, unfortunately, there are much more disadvantages in this self-made filter:

  • large size - takes up a lot of space in the aquarium;
  • gaps remain between the elements and water seeps into the filter;
  • often unaesthetic look.

Therefore, it is better to purchase a good filter and not waste precious time assembling a very inconvenient device.

What is the best filter for an aquarium to choose?

Every aquarium owner is interested in his device working stably and efficiently, and the fish lived for a long time. An important role in achieving these goals is played by good water filtration. What is the best filter for the aquarium and what rules to consider when choosing it? Let's try to figure it out.

Types and application

The choice of filter should be made taking into account who lives in the aquarium, what plants are in it and how many are there. If the aquarium is large, there are many plants and living creatures in it, then the filter should be powerful, effectively remove all contaminants from the water. Today, there are several types of filtration of water in an aquarium:

  • mechanical;
  • chemical;
  • biological;
  • combined.

What is the best filter for the aquarium? Consider the main features of each filtering system.


These filters are considered the simplest, but also the most effective for servicing aquariums of different sizes. Outwardly, they resemble a simple glass consisting of a pump (motor) and an absorbent sponge. The pump pumps the water in the aquarium, it passes through the sponge, as a result of which it is cleaned. Such filtering is effective for removing large contaminants - the uneaten food, fish excreta, residues of dead organisms. So if you are looking for which is the best filter for a small aquarium, give preference to mechanical models.


Thanks to chemical filters, water is treated through absorbents, most often aquarium coal is used for this purpose. It is advisable to use ion exchange resins, such as zeolite. Such filters are more efficient and practical due to the porosity of absorbent materials that absorb dirt particles well. Ion exchange resins do well with harmful poisons in the form of ammonia, nitrates and nitrites, which gradually accumulate in the aquarium.


The best and most reliable filtration for an aquarium is based on a biological filter. This method of water purification implies the presence of a special compartment in the filter itself, which is necessary for the cultivation of beneficial bacteria. For their reproduction, a special substrate is used. Bacteria play an important role, as they saturate water with useful substances and decompose harmful substances: ammonia, nitrites and nitrates - to a gaseous state. They are the most serious and dangerous enemy for aquarium inhabitants, leading to diseases and the death of fish. If you still doubt which filter is better for the aquarium to choose, consider the biological options.


These filters are convenient because they can purify water in various ways. Moreover, even the simplest mechanical model can be used as a combination, for example, by combining an absorbent sponge with aquarium coal. So the conclusion can be drawn as follows. For a small aquarium, mechanical devices are the most profitable option: cheap, but simple and convenient to operate.

If the aquarium is large, then you need to consult with a specialist who will help decide which filter is best for an aquarium of 100 liters and more. Most often it is recommended to use a biofilter, which, with a higher price and difficulty in cleaning, will be effective and durable. By the way, consider the filter's throughput. The effectiveness of his work depends on it. Depending on the location of the aquarium filters are divided into internal, external or mounted. Consider the features of each species in more detail.


These varieties are mounted directly inside the aquarium and may have a variety of filtering mechanisms. These filters are the most popular because of their affordable cost, ease of operation and cleaning. On the other hand, users note that they "eat up" the aquarium's usable space, but for large devices this is not so critical. Which inner filter for aquarium is better? Consider the most popular models:

  1. Aqua Szut Super Mini. This internal filter is suitable for aquariums of 10-80 liters, is distinguished by high-quality purification and aeration of water. Among the advantages of this filter, users note the ease of maintenance, compact size, low noise, the ability to position vertically or horizontally, a combination of mechanical and biological methods of water purification. Sophisticated aeration part of the structure contributes to the saturation of water with oxygen.
  2. Aquael Turbo Filter Professional. This internal filter pumps, purifies the water in the aquarium and performs its aeration. The difference from similar models is in high-quality water saturation with oxygen even at great depth.
  3. ASAP 500. Aquarium filters of this brand are distinguished by high performance and functionality, as well as an original design that keeps maintenance time to a minimum. So if you are not sure which internal filter for the aquarium is better to choose, and are looking for a truly modern and profitable option, the ASAP 500 deserves your attention. Its design is a combination of an energy-efficient motor with a high-quality filter sponge. The case is easy to clean or replace with a new one; in addition, this filter is ideal for use in shallow water.
  4. ALEAS IPF-6200L. Even more efficient and sophisticated, but expensive filter model. The increased level of cleaning is provided by two cartridges, and the model performs three functions at once - it filters the water, ensures its circulation and aeration. The biological filtration system is multi-level, and the filtering material is voluminous. As a result, the larger inner surface of the aquarium is cleaned, which is kept clean much longer.

These models are considered among the best and most productive and will be of interest to those who are looking for information about which filter for the aquarium is better to choose.

External filters

External filtering mechanisms are mounted outside the aquarium, and only tubes are placed inside it. About this variety reviews are very different. Some say that due to the large volume of filter materials, maximum water purification is provided, others note that a lot of space is needed near the aquarium to accommodate the filter, which is also expensive. Which external filter for the aquarium is better to choose?

Top models

We offer a review of popular models:

  1. Tetratec EX 400. This powerful filter is suitable for an aquarium of 10-80 liters and is distinguished by the comfort of installation and maintenance. Thanks to the integrated system of automatic start during installation and cleaning, the filter does not drain the water. With power, the mechanism works quietly. It is completed with five filtering mechanisms that provides high-quality and effective water purification. These are universal filters for aquariums. Which is better at 50l? The manufacturer offers a range of models, among which you can find the best option.
  2. Eheim. Products of this brand are mainly represented by canister filters that work reliably, stably and for a long time. The special design is protected from leakage, high-quality filtering materials are used, due to which the water is cleaned quickly and permanently. One of the most popular models is the Eheim Classic 2213, which includes sponges and gaskets, pipes and double taps. For large aquariums, Eheim Professional 3 2073 is useful - its volume will be enough for a model of 180-350 liters. Advantage - the presence of pre-filter, which increases the service life of all fillers.
  3. Tetra. This brand offers to buy a high-quality and reliable external filter for the aquarium. Which is better? Manufacturers offer a wide range of models that will provide the optimal balance of water in the aquarium.

Mounted filters - a compromise between the models described above. Structurally, the models are pumps, which themselves are located outside, and work inside. They are compact, but despite this, they are not very popular with aquarists.

Or bottom?

Another popular type of filter is bottom. The so-called false is a simple structure in the form of a plastic plate with holes - it is through them that the water passes. The filter itself is located at a height of 2 cm from the bottom of the aquarium, the ground is laid on the plate. Water passes through the soil, the bacteria in it contribute to biological filtration, so toxic ammonia is removed from the liquid. So there are a huge number of pump varieties. Which filter is the best for an aquarium? Based on the characteristics of the container and its contents.