Cold Wind COOLING FAN 100~240V for 36~60cm tank plant Chiller Marine Fresh reef Chooses nearby the water trough not to have the moisture the place. Is hanging the cooling fan above the tank, glass thickness essential is between 5~12 m/m. Revolves the screw, lets the cooling fan not be able to shake. Connect the cooling fan in the adapter. Turns on the switch, to start the cooling fan