Tetrabase & Hydroton

If sustainability is one of your priorities, you can't beat using reusable grow media like Hydroton and TetraBase™.
Hydroton, also known as expanded clay, clay balls, LECA, clay pellets or clay pebbles, is a popular hydroponic grow medium and often used in various hydroponic systems, including flood and drain, drip, and nutrient film technique setups.
Both TetraBase™ and Hydroton is reusable, easy to clean, and doesn't decompose over time.