Gold Label Hydro Clay PebblesGold Label Hydro Clay Pebbles are an industry favourite for a very good reason: they've been proven to get the job done over years of use, and there are legions of hydro growers out there who won't use anything else! Hydro pebbles create an airy root zone, holding lots of water on their rough, porous surfaces, while providing a stable medium for your plant to grow into. A high quality product.