Aquarium air pump with double diffuser. Not only can use one air pump to supply two multiple fish tanks or fish tanks but also two air stones can be placed in different positions of the fish tank, for 4-6mm air hose. to make oxygen distribution more even. Manual flow adjustment + rich accessories. You can adjust the flow through the valve to your flow needs in different environments. Low Power Consumption, Stable Airflow: 3W oxygen pump with low power consumption with maximum flow rate of 2 x 2.5L/min, stable airflow and efficient operation. Suitable for aquariums with a water depth: ≥ 0.8 m. 【Low noise and low vibration】Max decibels: 40dB, which creates a relatively quiet environment for the aquarium; place a towel or blanket under the air pump to improve vibration damping and noise propagation at the largest volume to slow down. 【Wide scope of application】The air pump of aquarium can be used in fresh and salt water as well as in aquariums, aquariums, ponds and small water features.