Utilizing high water flow in your saltwater aquarium is important for maintaining a healthy tank. For this reason it is important to have a high quality, reliable powerheads from brands you can trust. Bulk Reef Supply carries a full line of powerhead pumps from Cobalt Aquatics, Hydor Koralia, Maxi-Jet, Tunze and EcoTech Marine. Powerheads are submersible and attach by brackets, magnetic pull or suction cups depending on the brand and model. Ecotech Marine, Tunze and Hydro Koralia all make controllable models for easy flow rate changes.