Aquarium filter - filters for aquarium

An aquarium filter is more than just a simple water purifier that catches suspended particles. A good filter also ensures biologically active and clean water as well as oxygen input through water circulation. Pollutants such as nitrite, among others, are broken down by the nitrifying beneficial bacteria that settle in the filter, and the water surface movement ensures gas exchange and supplies oxygen so that plants and animals feel comfortable.

An aquarium filter is more than just a simple water purifier that catches suspended particles. A good filter also ensures biologically active and clean water as well as oxygen input through water... learn more »
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Aquarium filter - filters for aquarium

An aquarium filter is more than just a simple water purifier that catches suspended particles. A good filter also ensures biologically active and clean water as well as oxygen input through water circulation. Pollutants such as nitrite, among others, are broken down by the nitrifying beneficial bacteria that settle in the filter, and the water surface movement ensures gas exchange and supplies oxygen so that plants and animals feel comfortable.

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Nano Filter Cubes
Nano Filter Cubes
3,99* Old price: 5.99€*
(0.04€ * / 1 Milliliter)
-29%
NanoSpheres - Filter Medium Balls
NanoSpheres - Filter Medium Balls
4,99* Old price: 6.99€*
(0.05€ * / 1 Milliliter)
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Ceramic Vortex- Ceramic filter media
Ceramic Vortex- Ceramic filter media
4,99* Old price: 6.99€*
(0.05€ * / 1 Milliliter)
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Natureholic - Filter Inlet/Outlet Stainless Steel Inflow
-15%
HMF Nanofilter 20
HMF Nanofilter 20
16,99* Old price: 19.99€*
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Natureholic - Stainless Steel Stream Pipe Inflow
Natureholic - Stainless Steel Stream Pipe Inflow
from 32,99* Old price: 39.99€*
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HMF Nanofilter 35
HMF Nanofilter 35
19,99* Old price: 26.99€*
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Natureholic - Filter Inlet/Outlet Stainless Steel Outflow
-18%
SlimLine BubbleFilter with Air Stone
SlimLine BubbleFilter with Air Stone
from 8,99* Old price: 10.99€*
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Filters for aquariums

For each type of aquarium and aquarium size there is a suitable filter. Each filter has its advantages, so there are different internal and external filters, air-driven and motor-driven, some with a large biological filter mass, some specifically for mechanical filtration such as rapid filters and others that use the substrate as filter material.

External filters

External filters are available as stand-alone filters for under or next to the aquarium and as a trailer version - also called a backpack filter. Stand filters are available for small to large aquariums, they offer a very large filter volume and they can be equipped with a wide variety of filter materials according to requirements. Backpack filters offer not quite as large a filter volume compared to stand filters and you are more limited when it comes to filter media selection, but they are very popular for smaller aquariums.

The operation of external filters is very simple. Intake and outlet pipes are fixed in the aquarium and connected to the filter. Through the intake pipe, aquarium water is transported into the external filter, where it flows through the individual filter baskets and then flows back into the aquarium through the inlet bend.

Internal filter

There are three variants of internal filters. One would be a usual motor-driven filter with attached filter module. Here, the water is sucked in through the integrated slots, then transported through the filter media to the outlet nozzle. Many of these internal filters can also be equipped with further e.g. absorbing filter media. Furthermore, there are simple sponge filters and so-called Hamburger Mattenfilter (HMF) which are operated by air pump or with a flow pump. Such filters offer besides a good oxygen supply also a great biological filtration, shrimps and co. can graze the sponges / mats without danger and are therefore absolutely safe for very small animals.

The handling of internal filters is very simple, hamburger mat filters are almost maintenance-free and there are different models for small to large aquariums. As far as the choice of filter materials is concerned, one is already very limited here and they take up more space in the aquarium, but the water remains continuously in the aquarium.

Pumps / flow pumps

Flow pumps are used to make it more comfortable for flow-loving animals. They are used alone or in addition to filters in aquariums. Many models can be expanded by attachable filter sponges to fast or motor-driven sponge filters, which are then also shrimp-proof due to the sponge attachment.

Aerator pumps

Aerator pumps can be used to operate bottom filters or sponge filters including hamburger mat filters. They are very energy efficient and depending on the type and performance, several aquariums can be operated with only one pump. They are also suitable for use in conjunction with an aerator as additional aeration, which is highly recommended at night, when there is a lack of oxygen, during transport and on hot days. The pump is placed outside the aquarium. An air hose connects it to the airlift, sponge filter or diffuser in the aquarium. We always recommend to use backflow preventers, because they protect against backflowing aquarium water. For transport or in case of power failure, there are extra battery-powered aerator pumps.

Bottom filters

Bottom filters are grid plates that are placed under the substrate and equipped with a riser tube. The riser pipe is connected to a simple pump or an aerator pump. With a bottom filter you get a huge biological filtration area, it is completely safe for even the smallest aquarium inhabitants and fouling caused by leftover food in the substrate is avoided. However, a bottom filter is not suitable with nutrient media, sand, strongly rooting plants and burrowing animals.

More about the individual species can be found in the respective subcategories!

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