General Hydroponics Dual Diaphragm Air Pump. Features four independently controlled outputs for maximum flexibility.An industrial powerhouse air pump. Can also be used for aeration in large nutrient reservoirs. Uses a mere 8 watts of electricity, produces 3 PSI.
Finally I found this Pump: Dual Diaphragm Air Pump: HY, thanks god. It has really good lasting. Pump: Dual Diaphragm Air Pump: HY requires almost no maintaince.