Water circulation and proper oxygenation are important to maintain a healthy environment inside an aquarium. By keeping water moving throughout your aquarium, it becomes easier for filters to remove silt and debris. Good water circulation also contributes to the health of fish by providing currents that help the fish exercise, as well as delivering food and oxygen to all organisms inside the aquarium. There are different types of aquarium supplies used to oxygenate tank water, but to provide really great water circulation in addition to oxygenation, you’ll want to use a powerhead. Powerheads use motors to provide movement throughout the water. Hydor Koralia manufactures top-rated, highly recommended powerheads.Aside from powerheads, another important aquarium supply for reef aquariums with corals is the microbiotic system, a good source of which is Zeovit.One important advantage of Hydor Koralia powerheads is that they are very energy-efficient. Some aquarium owners are concerned about the use of powerheads, because they worry about increased energy consumption and costs as well as the possibility of overheating the aquarium. Hydor Koralia powerheads use a low amount of energy compared to other powerheads of equal strength. You need not worry about increased heat and energy costs.Every Hydor Koralia powerhead comes with a mounting system that makes it easy to set up and install. Removing and cleaning your powerhead is also hassle-free.Currently, Hydor Koralia powerheads come in the following models. The Hydor Koralia Original powerheads have four models with varying strengths. The Koralia Nano and the Koralia 1 move at 400 gallons per hour (gph), although the Koralia Nano is better suited for small aquariums. The remaining Koralia Original powerheads are the Koralia 2 (600 gph), Koralia 3 (850 gph), and Koralia 4 (1200 gph).The Hydro Koralia Evolution, like the Koralia Nano, was built for small aquariums. For bigger tanks, the Hydro Koralia Magnum is a very energy-efficient yet powerful option moving at 1650 to 3250 GPH.The Zeovit system is a probiotic system that promotes growth of microbiotic organisms, which helps keep nutrients at natural levels and provides alternative food sources to corals. Zeovit additives can be used in reef aquariums.