Pumps

For aquaria different kinds of pumps are used: from simple air lifts to high-efficient industrial pumps a large field of applications are possible.

For water feed from filter sump back to the aquarium (overflow system) it is important that the pump has not only a high flow (l/h) but enough pressure (m), too. The effective flow is shown in a pump diagramm: if you know the head (A) go from it horizontal to the graph. At this point you go downwards to the X-axis. This point is the effective flow of the pump under this conditions.

For producing currents inside of the aquarium you need pumps with very low pressure but with very high flows. As standard you should choose 5 times the aquarium volume per hour for feed pumps from filter sump to aquarium. For currents take 10 times the aquarium volume per hour.