Includes powerheadIncludes protein skimmerFeatures a unique baffle system that prevents the substrate and organisms from being disturbed, yet also allows enough water flow to eliminate any stagnant areasWater Capacity: 17 gallonsDimensions: 32" L X 12" W X 14.5" TDoes not include the light. Using TWO AquaFuge Small Lights, 18 Watt is recommended.The AquaFuge PRO is a sump-based refugium which incorporates a protein skimmer in order to maintain safe organic levels while also providing for oxygenation of any marine system The AquaFuge provides ideal growth conditions for food items, such as copepods and ampipods, to feed invertebrates and fish in the main tank.It provides a controlled growing area for macroalgae, which can be used to reduce "nuisance" algae in the main tank and provided a "nursery" area for a variety of organisms.