The internal filter for an aquarium is the pump which is pumping over water through the special capacity filled with filtering material. Designs won the popularity thanks to the low cost, simplicity of installation and operation.
Advantages of the internal filter
The main functions which are assigned to the internal filter is mechanical, biological, chemical filtration, aeration and creation of circulation of water. However in use in rare instances the filter should carry out the full list of functions. For example, in a tsikhlidny aquarium the internal filter is used for mechanical cleaning and aeration. Along with it they are used in various temporary aquariums having the small volume (otsadnik, karantinnik).
The internal filtering designs favourably differ in convenience of service, esthetic appearance and that is important for a small room aquarium, rather low noise level. Pumps which enter internal filters can be used for water pumping.
With such system resolves an issue of additional aeration of water. The air tightened from a water surface moves through a tube in a bell of the filter or on the turbine of the device and is sprayed in an aquarium.
Shortcomings of the internal filter
Internal filters are used in aquariums up to 180 liters. They cannot be recommended as full biological or chemical, and here they cope with the physical function perfectly well. In category of shortcomings the small filtering volume and also that fact that in an aquarium there is a foreign subject demanding masking belongs. A choice for the internal filter should be made if in an aquarium there is enough performance of a pomp up to 1200 l/h and the volume of the filtering material up to 700 quarter see Systems which work from the air compressor, have rather low power. They cannot purify strongly turbid water. As required the filter can be equipped with special cartridges, for example, coal or zeolitic by means of which difficult filtration of an aquarium is implemented. In spite of the fact that internal mechanical filters have low potential, they are demanded and demanded is very proved. It is absolutely logical to use the small internal filter to small aquariums. And in aquariums pictures the placement of other filters is not possible. During the keeping of small fishes or cultivation of juveniles of use of such filter happens enough. It should be taken into account that on a sponge of the filter bacteria which are capable to purify water from metabolism products lodge, serving weak and small, but, after all as a biofilter.