CPR's line of hang-on Refugiums, the AquaFuge series, come in three different sizes to meet the needs of marine aquarists. Each includes its own powerhead and features a unique baffle system that prevents the substrate and organisms from being disturbed while allowing enough water flow to eliminate stagnant areas. The AquaFuge provides ideal growth conditions for food items such as copepods and amphipods, to feed invertebrates and fish in the main tank. The AquaFuge also provides a controlled growing area for macroalgae, which can be used to reduce “nuisance” algae in the main tank and provide a “nursery” area for a variety of organisms. You can also add an 11 inch, 13 watt, 6500K Top power compact light, for only $29.99. (Check Box Below)