I have purchased a couple of these and enjoy how they are adjustable and have not had an issue with them failing.
This was my first time setting up an air stone. AQ's staff walked me through the entire process, including this airstone. Sunk immediately!
These are great plan on getting more soon.
Great airstone! Hasnt clogged or failed. Definitely worth the money!
Possibly the biggest pro about this airstone is that it sinks. It is also somewhat adjustable as to the size of bubbles you want.