Needed a new air pump for my two aquariums. Wanted a pump that delivers a high volume of air, and saw the pump has six air outlets. So, it was a no brainer to get all the volume of air I could use.The noise level is not whisper quiet. However, it’s still quiet relatively, for a piston pump. But, unless you’re looking for a White Noise producer, this pump would be better off outside the bedroom, as the humming could be bothersome.My set up is in my indoor Arboretum, so the humming is not a problem. The pump, for the noise level, produces the air, lots of it.I run four airstones off of the pump, and my tanks are well ariated. Probably would have no problem using the remaining two valves.I put my pump I a hanging basket to keep it well above the levels of the tanks. That reduced the noise level slightly.The pump does produce a slight amount of warmth. I can handle the pump with bare hands, no gloves needed.This is a very good, high volume air pump. Other than the noise level, which can be tolerated, if you make provisions for the noise, this pump is exactly what my fish needed. A good value for a powerful, high volume air pump. I gave the pump Five Stars on everything, except for the noise, which I gave a Three Star rating. If you can tolerate, or plan for the noise level this is a great air pump. [...]