How to choose a filter for an aquarium

The key to longevity of the inhabitants of any aquarium is properly constructed aeration and water filtration system. For this goals are using modern aquarium filters allowing solve many different problems. Cleaning the aquarium of impurities, garbage and waste products of living things, aeration and saturating water with oxygen are just a few of the tasks that able to solve the right filter.

choose a filter for the aquarium

The best manufacturers of aquarium filters

When choosing a device of this class, it is better to give preference brands well-known among aquarists:

  1. Tetra;

  2. Eheim;

  3. Jebo

  4. Aquael

Product reviews of the above brands can be studied online the Internet, on various subject forums devoted to aquarium, as well as social networks.

Types of filters for the aquarium

External filters

external filter for the aquarium

External devices not occupying usable area inside the aquarium. Performance may reach 300-400 liters per hour. Intended for use in compact tanks, the volume of which does not exceed 80-100 liters. Allows installation of replaceable filters, different in principle of operation – mechanical, biological or chemical.


  • Outdoor installation does not conceal the place;

  • Unpretentious in maintenance and cleaning;

  • Suitable for use with aquariums up to 100 liters;

  • High filtration performance;

  • Three types of different filters;


  • Expensive;

Bottom filters

Bottom filters

Compact devices mounted on the bottom of the aquarium and having an aesthetic appearance of a stone or other typical underwater subject. Suitable for aquariums up to 60-80 liters. Possesses silent operation and does not cause anxiety in underwater the inhabitants. Fits perfectly into the design of the aquarium and does not look alien at the bottom.


  • Miniature;

  • Saturates with oxygen;

  • Filters water from debris and waste;

  • Silent work;


  • Not suitable for large aquariums;

  • Requires regular maintenance and cleaning of the filter item;

Internal filters

Internal filters

They are a special container designed for Install directly into the aquarium. Distinguished by beautiful aeration and perfectly filter the water. Used with aquariums, the volume of which can reach 100-120 liters. Unpretentious in maintenance and cleaning.


  • Productive;

  • Provides for connecting an additional hose for the fence air;

  • Equipped with rotating nozzles to change direction of water flows;

  • Ease of cleaning and maintenance;

  • Inexpensive


  • Sneak a place in the aquarium;

  • Filtering is slightly worse compared to external models;

The main criteria for choosing aquarium filters

criteria for choosing an aquarium

After the buyer determines the specific type filter for the aquarium and the place of its installation, it is necessary to study technical characteristics of the model and compare them with the conditions operation.

Maximum aquarium volume

Regardless of the design, the specific type of filter for The aquarium is designed to clean a certain amount of water. Using the device in a tank whose capacity is exceeds recommended by the manufacturer, will lead to insufficient cleaning and death of pets as a result. Select this option It should be with a margin of 5-10 liters for efficient operation.

Device performance

Displays the amount of water passed through the filter element in one hour of continuous operation. Higher performance – the more efficient the process of purifying water from pollution. The best models show performance at the level of 400-600 liters in hour, that when installed in a small, about 60-80 liters, aquarium, Allows the device to dispense all aquarium water 3-4 times per hour operation.

Type of filtration

Depending on what type of contamination is needed neutralize, 3 types of filters are distinguished.

  1. Mechanical. Filters garbage, sand, silt, suspension;

  2. Biological. Designed for cleaning products. organisms;

  3. Chemical. Used to purify water from all kinds of chemical compounds (calcium, chlorine, iron);

Type of filler

Depending on what type of filler is used in quality of the filter element can vary significantly operational properties of a particular device.

  1. Sponge – the simplest filler, performing as a mechanical, and biological treatment of water from suspension and products life activity. Easy to operate and low maintenance. Differs in repeated use – all that is required is to remove filter element and rinse it;

  2. Zeolite. Special material based on zeolite clay. Designed to filter all kinds of chemical compounds, chlorine, iron and ammonia. Each such filter Disposable and requires replacement after 3-4 months of use;

  3. Activated carbon is the most common material for manufacturing filters. It features a high degree of filtration and cleans water from both mechanical and biological debris. Among the disadvantages, one can single out the tendency to absorb not only harmful, but also beneficial substances, as well as the need for frequent replacements – about 1 time per month;

  4. Synthetic winterizer. The finest porous material, providing fine water purification from suspension. For maximum efficiency and enhancement lifetime recommended to use with a sponge or zeolite filter;

  5. Bio filler. Special material representing a special environment for the active reproduction of beneficial bacteria. It is they who perform the filtration of water from biological and chemical trash. Recommended to be paired with a sponge or another filter that holds up the suspension and mechanical particles;

Energy consumption

Filters for an aquarium – devices powered by 220 Volt, and therefore it is also necessary to draw on energy consumption Attention. Most models are equipped with an electrical circuit, the power of which may require 5-7 watts of electricity per one hour of work, which is almost not displayed on the account for electricity.

The need for cleaning and replacing filter elements

The replaceable element acting as a filter, over time clogged with garbage and ceases to fulfill assigned to it functions. It is more convenient when the filter element is cleaned. as rarely as possible without affecting the functioning of the device. In such If filter replacement can be combined with cleaning the aquarium and water change;

The direction of the water flow and the possibility of changing it

The jet of water leaving the filter should evenly distributed throughout the aquarium and not scare your appearance the inhabitants. Better when the change of direction is carried out in fan mode and automatically adjusted.

Features of choosing an external filter for the aquarium

An external filter is often chosen consciously because of its convenience. operation, cleaning and maintenance. Good device options of this class are the following:

  1. Productivity at the level of 300-400 liters per hour;

  2. Permissible volume is up to 100-120 liters;

  3. Fan spraying a stream of water;

  4. The ability to quickly replace the filter element with the need;

  5. The versatile types of filtration systems that change when the need;

  6. Minimum noise operation;

  7. Energy consumption no higher than 10 watts per hour;

In the following articles, our experts tell you how to choose telescope and the secrets of choosing a microscope.

Attention! This material is subjective opinion of the authors of the project and is not a buying guide.

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