SUNSUN YT-302C Aquarium Air Pump
SUNSUN air pumps provide reliable service at an economical cost. Efficient and easy-to-use, SUNSUN air pumps can handle the aeration needs of aquariums from 30 to 60 gallons.
Super silent with multi-level muffler 
Special artificial rubber to keep a steady air flow output and pressure that can be adjusted freely. 
Low power consumption 
3-watts, 3 liters per minute (1.75 PSI X 2)
This Pump is exactly tice as powerful as YT-301