Safe and Efficient 24V Power Solid Cast Acrylic Construction High Performance VarioS Skimmer Pump 5 Controllable Energy Saving Power Settings Detachable Controller with Waterproof Union Safety Float Switch 0-10v Input for 3rd Party Controller Integrated Memory Two different pause/feed modes that will shut off the pump for either 15 or 60 minute intervals. The new and innovative Reef Octopus Regal 200-INT in-sump protein skimmer supplies powerful filtration for aquariums up to 400 gallons where sump space is not limited. The Reef Octopus Regal 200-INT is constructed of high-quality cast acrylic that disassembles completely for cleaning. Its hybrid conical body naturally stabilizes and concentrates the organic rich foam as it rises. This Regal skimmer is quipped with a new generation Reef Octopus controllable Direct Current VarioS-4S pinwheel skimmer pump which are the latest in variable speed flow technology and allows for refined control, enhanced performance and efficiency. The vast majority of skimmer pumps available to hobbyist are alternating current "AC" pumps (the type of power that comes out of your wall outlet). Direct current pumps have several key advantages over traditional AC pumps. Most notably, you can control the rotational speed of the motor, thus electronically control air and water flow rates into the skimmer. Now the user can have the skimmer process more or less water just by the push of a button.