Used it to replace a 5-60 gal ph $14 pump that lasted about a month and was to weak to grow through the flowering stage this one has worked good for 4 5gal buckets FOR DWC with no problem good air pressure with the 4in air stones

I suppose I shouldn’t be surprised by the noise, but it’s more than I’m used to and seemingly loud given the power level. The power is pretty good but I expected a bit more, if I’m being honest. The heat level is not terrible, but I wouldn’t hold it to an extended period.
Overall, it seems well made a provides a good amount of air, but I wish it had a bit more padding to reduce the noise.

Good product, fast shipping everything was as described

This really met and even exceeded my expectations.
Was looking for aquarium air pumps that could supply a lot of bubbles for my airstones and this is the only one that was able to fullfil that need.
It even has a 6 gang attachment and so far I am only using two (2).
Working great and better than all of the other obes that I bought.
Not really super quiet but not extremely loud. You can say that the sound is a tolerable monotonous hum.
Would buy again.

Very powerful and reliable fish tank pump.

First, understand I did not buy this to aerate an aquarium but I am bubbling air through water. OK. I'm using this pump to pass air through a Birkeland – Eyde reactor. So the air flow goes from the pump into a 2 gallon glass jar, then through a second hose out to a 1 liter jar to bubble through water. I bought the 18 watt model. Oddly, it pushes more air than needed through an open tube and I actually had to restrict the air flow down by 50%. But once I attach a ceramic air diffuser, it completely stops working. It will push air down to the diffuser, where it just stops. I have no explanation for this but I am using it a little differently than it is designed for.
It's very well made, reasonably quiet – remember it is commercial grade like for use in a restaurant or something which is why I bought it. For that function – aerating a lobster tank, large fish tank, something like that, this is a very good pump. Very small and easily concealable. Despite its inability to push air through a diffuser in my specific application I give this pump 5 stars and would buy it again.

This is the best air pump I have ever owned it's a little loud at times so I just move it and it quites down again I'm buying my 3rd one now cause I need a strong multi port air pump for my 60gal tank I have a 50gal and a 30 gal also best pump for your money lasts a long time too!!!