The Tunze Replacement Osmolator Pump 5000.020 is a high-quality dosing pump designed to operate with low voltage ranging from 3-12V DC, making it versatile for various applications in saltwater aquariums. This pump features an efficient design that can handle up to 4mm hose diameters and delivers optimal flow rates at different head pressures: 0.9 meters (110 liters per hour), 1.4 meters (80 liters per hour), and 1.8 meters (58 liters per hour) with a maximum height of 3.6 meters, ensuring reliable dosing for your aquarium’s precise needs. This pump is ideal for experienced reef tank owners who require accurate chemical dosing to maintain optimal water parameters essential for the health and growth of marine life.