About Water Pumps The success of your tank depends largely on how well water moves through your system. Water pumps are an excellent and essential way to get that H20 flowing to where it needs to go, such as into your skimmer or reactor. Most pumps are either external (dry) or internal (wet/submersible), although some are both. My Reef Creations offers 4 main lines of premium water pumps including MAG pumps by Danner, Iwaki (Japanese), Sequence, Pan World (Japanese) and Gen-X water pumps.