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HomeBlogSubstrate Calculator: How Much Do I Need for a Naturalistic Vivarium or Bioactive Terrarium?

Substrate Calculator: How Much Do I Need for a Naturalistic Vivarium or Bioactive Terrarium?

At Josh's Frogs, we've been making our very own naturalistic vivarium substrates and supplies for almost two decades. We've developed some basic rules-of-thumb for the amount of different substrates you'll want to use to successfully set up a naturalistic vivarium.

Below is a list of the recommended substrates, followed by a calculator. Just plug in your tank dimensions (in inches), and it'll tell you how much substrate you need!

Leaf Litter - Leaf litter provides both organic food for the microfauna and plants in the tank. Leaf litter also provides hiding places and visual barriers for the larger inhabitants of the vivarium.

Long Fiber Sphagnum Moss - Sphagnum moss is placed between the substrate and leaf litter layers in a vivarium to prevent the substrate from adhering to the frogs, and to increase the suitable environment for microfauna.

ABG Mix - Atlanta Botanical Gardens substrate is capable of lasting several years when used properly. ABG Mix will support a sizable population of microfauna while allowing plants to thrive. In order to give your vivarium a boost and get it cycled faster, consider adding Josh's Frogs Bioactive Booster to the substrate. It'll add beneficial nutrients and fungi to the soil that helps with waste processing and plant growth.

Substrate Barrier - Substrate barrier prevents the ABG layer from pushing down into the false bottom. The substrate barrier can be cut or folded to fit in your specific enclosure.

Hydroton/False Bottom - Hydroton (also known as LECA, for light expanded clay aggregate) is a great choice for the false bottom or drainage layer in a vivarium. LECA is a natural product, made from heated clay. It retains moisture, provides lots of surface area for bacteria and plant roots to grow, and wicks water, which will help maintain humidity in a vivarium.

Naturalistic Vivarium Substrates Calculator

This calculator will provide recommended amounts of naturalistic vivarium substrates based on enclosure length and width. All estimations are rounded up, you may have a bit leftover!

Please enter length in inches.
Please enter width in inches.
Recommendation based on 5qt bags of False Bottom, and a 2" layer.
Recommendation based on 4qt bags of ABG Mix, and a 2" layer.
Cutting the Substrate Barriers may be required for maximum coverage.
Estimation based on expanded liters of Sphagnum needed for a 1/2" layer.
Recommendation based on gallon bags of leaf litter, at 1" depth.