These versatile little pumps have fully adjustable flow rate regulators (not HX-2500) and have the ability to work in low water level conditions. HX2500 and HX-4500 models also come with oxygen intakes as standard.
These versatile high jet water pumps have a wide range of applications and are expecially useful for dripper systems because of their high power at a relatively low cost. Can be used immersed or inline outside of your water.