SUNSUN JY-02 SURFACE SKIMMER 3W 300 L/H SUNSUN JY-02 SURFACE SKIMMER 3W 300 L/H Surface skimmer Surface skimmer, removes oil, leaves and keeps the top surface clean With high quality sucker. Flow rate adjustable. Adjust the water level within 4CM automatically. increase the water liquidity, and promotes therefore proper gas exchange.