Eheim Adjustable Air Stone

Best there is for oxygenating aquariums

Brilliant output!

Very good product ,because the air stone is small i thought it wouldn"t produce many bubbles but it does.Would buy again.

Good quality product that produces lots of bubbles, however it is not that easy to fine tune, either lots of small bubbles or large bubbles. Can be noisy on some settings. Can be cleaned easily and should last a lot longer than an air stone.

A great air pump head for providing a tight grouping of bubbles, the adjustment to bubble size is via the collar. Mounting sucker is standard eheim quality and attaching it once is job done. The only minor complaint I'd have is that the head cannot be twisted sonthe airline connection will always require the air pipe to point upwards. Which means you cannot hide the cable easily.