Nothing fancy, but does the job well. My cherry barbs love surfing the bubbles to the top of the tank.
It was easy to install and works as expected. It's been running in a 75 galloon freshwater tank for over a month now with no problems. It makes a nice bubble wall.
It broke as I was putting the hose on it. I'm not particularly strong nor was I forcing it. It just snapped. I don't expect much from a $4 item but probably won't get this again.