Hobby - Vulcano, Lava airstone 11 x 8cm

Every VULCANO airstone is a unique, selected piece of genuine volcanic rock. By means of the internal hollowing-out of the stone, the air seeks the path of least resistance, giving a different air output at different points. Large air bubbles can thus be expelled even without the use of a powerful pump. Every stone is individually finished and tested, and then flattened off on the underside for easy and stable positioning.