Aqua Medic ReefDoser dosing pump - three independent pumps with an integrated controller for precise adjustment. The Aqua Medic Reefdoser is one of those eagerly awaited products that brings a smile to the face of every marine life enthusiast who sees it. The Reefdoser can operate independently to run up to 4 dosing pumps. The integrated controller allows precise adjustment of the on/off cycle for each pump over a wide time range - from seconds per minute to hours per day. The Reefdoser can automate many tasks in your aquarium system: - Regular distribution of trace elements and fertilizers in saltwater and freshwater systems - Controlled addition of two-part calcium supplements at separate intervals - Precise dosing of calcium water to coral tanks - Regular feeding of phytoplankton and live zooplankton Available models: Reefdoser Twin two dosing pumps with integrated controller Reefdoser Triple three dosing pumps with integrated controller