SYBA Soil - Clay Balls
Expanded clay balls (hydro balls) to use in the bottom of your terrarium as a drainage layer, or use as a growing medium in hydroponics. You can even propagate plants with balls, just fill a container with water and hydro balls and put the cutting in. 
   Light-weight
   Holds and releases moisture quickly
   Multiple applications
Our clay balls are the appropriate size for smaller and larger containers and come in convenient bags that are resealable. Clay balls are also effective at growing orchid plants. 
Clay balls for hydroponics
Due to their porous nature they hold water while still allowing air to move through the substrate, creating an ideal environment for root systems. Do note that the clay balls do not contain fertilizers. Clay balls have a neutral PH value. 
Clay balls for a terrarium
A terrarium needs a layer of inorganic materials to hold the bottom water reservoir keeping the terrarium moist. Simply placing a layer of dirt at the bottom will cause issues as water will collect there, causing mold & root rot. More on building a terrarium. 
Clay balls as a mulch layer
Hydro balls is a decorative and functional material to use as mulch. The soil below won’t dry as quickly by blocking the sun from hitting the soil. It will also increase moisture retention of the soil.