LiaFlor (Hydroton) Clay Pebbles 4-8mm 5L Bag Price: $29.99 (as of 26/03/2023 02:42 PST- Details)

“Expanded clay,” a lightweight gravel which is manufactured specifically for hydroponic cultivation.
This media is the first choice for many commercial growers specializing in flower and vegetable cultivation.
Hydroton is pH stabilized and releases practically no minerals into the nutrient stream; in other words Hydroton is almost completely inert – except for offering excellent moisture and oxygen capacity to stimulate healthy root development.