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 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.
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 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 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!