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 coral reef hobbyist who sees it. The Reefdoser pump can operate up to 4 dosing pumps independently. The integrated controller allows precise adjustment of the on and off duration of each pump over a wide time range - from seconds per minute to hours per day. The Reefdoser pump can automate many tasks in your aquarium system: - Regular distribution of trace elements and fertilizers in saltwater and freshwater systems - Addition of two-component calcium additives at separate intervals - Precise dosing of limewater in coral reef 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