Hydroballs make a superior base layer for terrarium setups. Use below the mesh layer and substrate level in terrariums to create an "aquifer" below your substrate level. Perfect for increasing humidity levels for all tropical species. Makes an excellent substrate for live plant root growth and for waterfall filtration.
HydroBalls 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.
I've been using Hydroballs for a few years now and love the product! They are lightweight and make for a good substrate in combination with moss etc. for my poison dart frog terrarium. The balls are large enough that they don't get sucked up in the filter as well plus very affordable.