Zoo Med HydroBalls Lightweight Expanded Clay Terrarium Substrate, 2.5 Pounds

HydroBalls€ž 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."