The Nero pump you know and love, now in a smaller form factor. Aqua Illumination's Nero 3 creates an adjustable broad flow that is strong but gentle at the same time. Traditional propeller designs produce a hard stream that can irritate corals where the Nero 3's innovative propeller pushes water in a wide pattern that can move foods, detritus, or other free-floating particles around without blasting corals directly. Powerheads have many different uses around a reef tank, but the main goal is to produce enough flow to keep low-flow spots from forming in your tank and help elevate detritus to be sucked into the filtration. With BlueTooth LE technology you can set the pump up into different modes, or create a daily schedule to change the flow up throughout the day.