Zoo Med HydroBalls Expanded Clay Terrarium Substrate - 2.5 lb

Expanded Clay Base Layer for Naturalistic Terrariums

Zoo Med HydroBalls Expanded Clay Terrarium Substrate is a versatile base layer substrate designed for use in naturalistic terrarium setups. Used beneath Zoo Med's Eco Earth coconut fiber substrate or other top substrates, HydroBalls create an underground water table that supports humidity management and live plant growth in tropical reptile enclosures.

Simply add water to the HydroBalls layer to create a natural aquifer effect, increasing ambient humidity levels for tropical species that thrive in moist environments. The expanded clay structure also makes it an excellent medium for live plant root growth and can be used as a filtration layer for terrarium waterfalls.

Each bag contains 2.5 lb of brown expanded clay substrate, providing enough material to establish a functional drainage and humidity base layer in a variety of terrarium sizes.

Key Benefits

• Creates an underground water table when used as a base layer beneath other substrates
• Increases ambient humidity levels - ideal for tropical reptile and amphibian species
• Excellent medium for live plant root growth in naturalistic terrarium setups
• Can be used as a filtration layer for terrarium waterfalls
• Compatible with Zoo Med Eco Earth and other top substrates
• Reusable expanded clay material
• 2.5 lb bag provides ample coverage for a base drainage layer

Why Reptile Owners Choose It

Keepers building naturalistic or bioactive terrariums choose Zoo Med HydroBalls for their ability to create a functional drainage layer that prevents substrate waterlogging while maintaining the humidity levels tropical species need. The expanded clay structure supports live plant roots and works seamlessly with Zoo Med's Eco Earth substrate system, making it a go-to component for bioactive and planted terrarium builds.

Quick Product Snapshot

Material and Design Breakdown

HydroBalls are made from expanded clay - a lightweight, porous material that absorbs and retains water while allowing excess moisture to drain freely. When layered at the base of a terrarium, the expanded clay creates a reservoir zone that separates standing water from the upper substrate layer, preventing root rot in live plants and keeping the surface substrate at the right moisture level for burrowing and surface-dwelling species alike.

The brown coloration blends naturally with soil-based substrates and organic terrarium materials, maintaining a naturalistic aesthetic in planted and bioactive setups.

Setup and Compatibility Guidance

Place HydroBalls as the bottom layer of your terrarium before adding your primary substrate. Add water directly to the HydroBalls layer to establish your underground water table. Layer Zoo Med Eco Earth or another compatible substrate on top. For waterfall setups, use HydroBalls as a filtration medium around the pump or water feature base.

Care and Maintenance

Monitor water levels in the HydroBalls layer to maintain desired humidity. HydroBalls can be rinsed and reused when refreshing or rebuilding a terrarium setup.

Ideal for Reptile Keepers Who...

• Are building naturalistic or bioactive terrariums for tropical species
• Want to create a functional drainage layer to prevent substrate waterlogging
• Are growing live plants in their reptile or amphibian enclosure
• Need to maintain elevated humidity levels for tropical reptiles or amphibians
• Are incorporating a waterfall or water feature into their terrarium setup

Frequently Asked Questions

How do I use HydroBalls in my terrarium?
Place HydroBalls as the bottom layer of your terrarium, add water to create an underground water table, then layer your primary substrate on top. Zoo Med Eco Earth is a compatible top substrate.

What species benefit from HydroBalls?
HydroBalls are designed for tropical reptile and amphibian species that require elevated humidity levels in their enclosure.

Can HydroBalls support live plants?
Yes - the expanded clay structure is an excellent medium for live plant root growth in naturalistic terrarium setups.

Can HydroBalls be used for waterfall filtration?
Yes - HydroBalls can be used as a filtration layer for terrarium waterfalls and water features.

Are HydroBalls reusable?
Yes - HydroBalls can be rinsed and reused when refreshing or rebuilding a terrarium setup.

Product Highlights

• Expanded clay base layer substrate for naturalistic terrariums
• Creates an underground water table to manage humidity
• Supports live plant root growth
• Compatible with Zoo Med Eco Earth and other substrates
• Usable as waterfall filtration medium
• Brown color for a naturalistic aesthetic
• 2.5 lb bag

Product Specifications