Designed to work with an air pump to keep oxygen flowing gradually, with no noise or large bubbles, just a soothing column of fizzy goodness. Perfect for oxygenating hydroponics: natural pores let airflow through to diffuse oxygen into the water and keep your plant roots breathing easy.

Pro-tip: Grab a Dura Pump Air 2 to drive your stone and get your fizz on.

Large round airstone