Aquarium Pond 3" Air Stone Ring Airstone Hydroponics

Absolute rubbish!. I bought this to replace the ball shaped air stone that I have as I didn't think it let out many air bubbles. The photo of this product shows a full circle of bubbles and I thought it would be ideal for my mini pond. What I actually got was a few bubbles from one section of the stone and that's it, needless to say, it went straight in the bin and I'm now using my original air stone.