EcoPlus 728492 Fixed Flow Submersible Water Pump EcoPlus Fixed Flow Rate Submersible or Inline pumps are great for a variety of application including hydroponics, aquariums, ponds and more These magnetic driven pumps are constructed with a high quality rare earth rotor magnet which helps deliver an efficient, powerful and constant water flow All pumps are oil free and have a ceramic shaft impeller that allows for use in fresh or saltwater applications