The return pump is the heart of a marine aquarium. It ensures proper skimmer operation, consumes minimal energy, and provides the required flow rate. Today, we have the Octo VarioS 2<\/strong> in our hands, our next return pump. Let\u2019s dive into our review.<\/p>\n The Octo VarioS 2<\/strong> may not be the first choice that comes to mind for your marine aquarium\u2019s return pump<\/strong>. However, we were intrigued by one key detail: its exceptionally low power consumption. This led us to choose it as our return pump, and before putting it into operation, we tested every aspect\u2014consumption, flow rate, and head pressure.<\/p>\n In short, we found no weak points<\/strong>. Not only do its performance metrics match Octo\u2019s claims, but we also discovered outstanding maintenance ease<\/strong> and record-low power consumption<\/strong>. We\u2019ve never seen a pump with this level of efficiency. And the noise? Although we didn\u2019t measure it, it is virtually inaudible. Keep reading to see all the data we recorded in our review.<\/p>\n The pump operates at 24V and is adjustable in five steps, making it suitable for a wide range of marine aquariums. We appreciated its color scheme but were less enthusiastic about the gray connectors\u2014we would have preferred red to match the base and rear casing. The pump comes with two sets of hose adapters in different diameters. A crucial note:\u00a0never use the smaller adapter!<\/strong>\u00a0Read why in our article on saving energy in marine aquariums<\/a>.<\/p>\n The Octo VarioS 2<\/strong> is a centrifugal pump with an alternating current motor that operates at a low, adjustable voltage. As always, we measured head pressure, flow rate, and power consumption. For head pressure, we used our standard static method. For flow rate, we used the DigiFlow 6710M flow meter<\/a>, and for power consumption, we relied on the RCE PM600<\/a>.<\/p>\n Before diving into the technical data, check out our in-depth video review. We not only discuss the pump and its performance but also explain head pressure and the differences between technical and measured values. We provide guidance on sizing and demonstrate our testing procedures. It\u2019s a must-watch! Use English subtitles if you need it.<\/p>\n![\"\"](\"https:\/\/reefs.com\/blog\/wp-content\/uploads\/2025\/03\/2025-01-octo-pompa-di-risalita-VarioS-2-Copyright-by-DaniReef-007.jpg\")
<\/a><\/p>\nVideo Review of the Octo VarioS 2 Return Pump<\/h2>\n