Flow pumps or centrifugal pumps such as the AquaEl Circulator or the ProFlow from JBL are popular for use in aquariums where more flow is needed. The prime example here is aquariums for fan shrimp and other aquarium animals such as fin suckers, which are found in nature in more current-rich streams and rivers. They have adapted to these conditions and also need good water movement in the aquarium, which allows them to live in a manner appropriate to their species.
An additional flow pump, which provides more water movement and thus a higher oxygen input, is also a good solution for the hot months in summer.
With the help of a filter cartridge or with a piece of filter sponge you cut yourself, you can turn the AquaEl Circulator into an efficient and shrimp-safe internal filter. Alternatively, a flow pump can be used behind a hamburger mat filter.
Centrifugal pumps are also often used in paludariums and waterfall aquariums. Here the water from the water part is transported upwards with the help of the pump, from where it runs over the emersed part from roots and so on back down and so incidentally still waters the land part. Especially the smaller submersible pumps do not need a high water level and are therefore perfectly suitable for aquaterrariums and indoor fountains.
A submersible pump is also practical when changing water, and when it comes to pumping water out of a rain barrel or treated osmosis water out of a water barrel, it has already proven itself many times over. Connect a suitable long hose and you're ready to go!
If the water flow of the pump decreases significantly, you should disconnect the power plug and disassemble the flow pump (please refer to the operating instructions). Usually the filter wheel is clogged with plant residues or similar. Remove contamination, then the pump will run again.