It is a great starter aquarium because they feature a compact and customizable filtration chamber that is already built-in to the back of the aquarium. Among other great features are the quiet submersible pump, dual intakes, and an adjustable return nozzle. Creating a larger viewing area with the new 16 and 32 sizes. Compatible with all existing accessories. The integrated 24-hour timer makes it easy to control the three independent channels: Bright white, sparkling blue and color enhancing LEDs for maximum beauty. Includes automatic 30-minute sunrise/sunset and 60-minute moonrise/moonset functions to replicate a natural day/night cycle.