Clay balls are a perfect hydroponic substrate for those wanting to use recirculating or constant flow systems. They allow the plants roots to firmly grip and absorb nutrients whilst also allowing for a safe and consistent flow of water, without clogging or problems. 

• Provides additional aeration to the root zone
• Perfect for use in Aquaponics!
• 50L bag for your convenience
• Manufactured specifically for medical-grade horticulture, no heavy-metals!
• Low dust
• RHP Certified for horticulture
• The original old school clay balls