Lily pipe consist of 2 major parts, the inflow and outflow pipe. These pipes are used to increase water movement in lower parts of the aquarium where water can easily become stagnant and at the same time aerates and skim away accumulation of oil at the water surface with a simple attachment of water skimming device (optional) on it's inflow pipe.
Powerful flow rate are usually used to create strong currents. The feature of the outflow pipe is to create powerful flow rate for stronger currents without disturbing the aquascape within an aquarium. These are great for fauna that favour flowing current.