Blue Diamond ECO ETX Series Linear Diaphragm Air PumpThe ETX series range of air pumps ensures that there is plenty of water movement in both aquatic and hydroponic applications; this boosts oxygen levels in the water, circulates nutrients. The Enviro ETX series features energy efficient motors which don't lose performance Features & Benefits 350 to 2100 liters per minute Robust and compact construction weatherproof Green drive technology offers energy efficient motors meaning low power consumption with