HydroBalls™ Expanded Clay Terrarium Substrate can be used as a base layer underneath a coconut fiber substrate or other substrates to create an underground water table in a terrarium. Add water to create a natural “aquifer" and increase humidity levels for all tropical species. Excellent substrate for live plant root growth in terrariums. It is also ideal to use as filtration for a running waterfall in your terrarium! See detailed picture below
