The VarioS 4 Controllable Circulation Pump from Reef Octopus is a top-of-the-line option for expert aquarists. It has a detachable controller with a mount, a durable ceramic shaft, and variable speed technology for improved efficiency and safety. Unlike most pumps that run on alternating current, the VarioS uses less energy and produces less heat. Additionally, the controller allows for precise control over the pump, with options for a float switch and pause/feed modes. It also has a 0-10v input for integration with third-party controllers. The pump comes with all necessary components for easy installation.