Hydrofarm Active Aqua Commercial Air Pump, 4 Outlets, 6W, 15 L/min

It is so damn loud we can't use it even during the day! Also has a weird plug which wasn't mentioned, had to figure what the plug was then wait another several days for an extension plug to be delivered!

I have no idea if this pump is any good as I can't use it as it has an American plug which was not mentioned

I'm an aquaponics guy and raise my own tilapia. I've tried a few different pumps out there and so far this brand has been the best value based on two main things: #1) Air flow per dollars spent - This pump puts out GREAT air flow through two separate outlets that don't depend on each other. That's a huge benefit that eliminates having to have a "T" fitting AND two adjustment valves, which can not only slow your air flow but it's a pain in the ass to adjust. #2) Noise - This pump puts out a little noise, but surprisingly less than I would have expected for a high volume pump. I'd say about 30% more noise than a Tetra Whisper pump but 300% more air flow given the equivalently rated Whisper. It also has very little vibration. Extra bonuses include the 2 outlets as mentioned, and adjustable air flow which is really cool. I own a bunch of pumps, including several Whispers like the Whisper 20, Whisper 40, and the larger Tetra 26075 Whisper Air Pump, 150 which even that produces only 2.6 liters/min air flow while this sucker puts out 7.8 liters/min, although the Whisper is definitely the quietest pump on the market. BOTTOM LINE: There are other pumps that put out more air flow but they are much more expensive and very loud. There are also more quiet pumps on the market but you would need 2 or 3 of those to put out the same air volume as this one. For the techies out there, specifications on the box says: Power = 3W ; Pressure = >3.768 PSI ; Air Output = 7.8L/Min ; Noise = <40 dB ; Weight = 1.5 Lbs ; Size = 162mm X 100mm X 87mm (6.4" X 4" X 3.4"). Comes with a 4 foot cord.

Very low power

Although this pumps air wonderfully, it's loud. Very loud. Direct from unpacking, it's running at 62dB. This is louder than normal conversation and is almost as loud as street noise. With doors closed, I can still hear it pumping away in other rooms. Should it be this loud? Unfortunately, it's expensive, it's not broken and I have to keep on using it until it dies.

Excelente, no hace ruido y pude conectar con llaves 12 miniacuarios de 2 litros

Pros: Cheap, works well, adjustable flow (and noise). Cons: Power cord is EXTREMELY thin - susceptible to physical damage. The unit could be quieter but it is fairly quiet (to expect it to be quieter seems like asking 'too much' considering the good performance and great price. EDIT on full blast this unit is the quietest device in the room :) I HIGHLY recommend this unit. Once again I must say it is fairly quiet and I am extremely pleased.