Zoo Med Hydroballs Lightweight Expanded Clay Terrarium Substrate [Reptile Bark, Soil and Moss, Reptile Supplies] 7.5 lb (3 x 2.5 lb)

HydroBalls by Zoo Med is an Expanded Clay Terrarium Substrate can be used as a base layer underneath Zoo Meds Eco Earth coconut fiber substrate or other substrates to create an underground water table in Naturalistic Terrariums. * Add water to create a natural "aquifer" and increase humidity levels for all tropical species * Excellent substrate for live plant root growth in Naturalistic Terrariums * Use for filtration for a waterfall inside a terrarium