This pump has been designed for dosing larger amounts of water or liquids. It was a water flow rate of 1 litre per minute Online controlling SMS/Push Alarms Reef Smart It can also be used for automatic water changing The dosing Pump Large is also a very interesting alternative for a typical automatic evaporated water refill system. After calculating the amount of RO water that is added daily to your system, you can set this amount and dose it with the Reef Factory Large Dosing Pump