EHEIM aquarium supplies UK
provides a good quality submersible water pump. These pumps run
entirely under water. The filter draws water from the filter and pushes
it back into the aquarium, thus cleaning the water in the process.
An
advantage of using this type is that it is easy to install and also
tends to be quieter. The disadvantage is that they emit heat and this
can raise up the temperature of the water.
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