The project of the return pumps is now old and started with the previous article “return pumps: calculating the flow” that I invite you to read, and where I proposed an excel file, downloadable, editable with most of the pumps on the market, which were often recommended as return pumps in the forums and among hobbyists. The file made possible from the data of the pumps and the prevalence of each tank, get a pump flow rate calculated for each individual pump.

Although the file would be updated by anyone, I was always curious to know how pumps would behave in reality as well as declared by individual manufacturers.

During the Zoomark held in Bologna, Italy last year, we decided to contact some companies in the aquarium industry to do a comparative test of the pumps.

Some have enthusiastically joined, in true alphabetical order, Eheim, Tunzeand Sicce, and they have provided the pumps subject of our comprensive test.… More: