The new Coralife Luft Pump is an air pump that has been specially designed to work with deep tanks. Adjustable and optimized to enhance performance, the Coralife Luft Pump is perfect for a wide variety of equipment such as protein skimmers, under-gravel filters, ozone/oxygen reactors and air pump driven ornaments. At maximum, the flow rate ranges from 1.86 liters/minute to 4 liters /minute depending on the depth of the tank.