ReptiTherm Under Tank Heater – Reptile Heat Mat

The ReptiTherm Under Tank Heater is a dependable reptile heat mat designed to provide safe, consistent 24-hour heat for tropical and temperate reptiles, amphibians, and small animals. Ideal as a primary or supplemental heat source, this low-wattage reptile heating pad permanently adheres to the outside of your terrarium for optimal heat transfer and energy-efficient warmth.

UL/cUL approved (GS/TuV/CE in Europe), each unit features a solid-state nichrome heating element for reliable, long-lasting performance.

Available Sizes:

• Mini (RH-7): 4" x 5" • 4 Watts • For 1–5 gallon terrariums • Ideal for hermit crabs, small lizards, small snakes, tarantulas, salamanders, frogs, and small amphibians
• Small (RH-4): 6" x 8" • 8 Watts • For 10–20 gallon terrariums • Suitable for reptiles, amphibians, small animals (including mice and rats), or plant terrariums

Key Features:

• Provides consistent 24-hour belly heat for reptiles and amphibians.
• Solid-state nichrome heating element ensures even warmth distribution.
• Adhesive backing bonds securely to the outside of glass terrariums.
• Laboratory tested and UL listed for safety.
• Rubber feet included for safe bottom mounting and airflow.
• Low wattage design for economical, energy-efficient operation.
• Compatible with reptile thermostats for precise temperature control.

Installation & Use:

1. Peel adhesive backing and firmly attach heater to the outside underside or lower side wall of the terrarium.
2. Position on one side (opposite the water dish) to create a proper temperature gradient for thermoregulation.
3. If bottom mounting, elevate the terrarium slightly using the included rubber feet to prevent heat buildup.
4. Plug into a properly rated outlet. If room temperatures exceed 80°F (26.6°C), use a reptile thermostat or unplug the heater.

Temperature Guidelines:

• Boas/Pythons: 82–90°F
• Garter Snakes: 72–84°F
• Green Iguanas: 90–100°F
• Anoles: 75–85°F
• Tropical Lizards: 80–90°F
• Desert-Type Lizards: 85–95°F
• Mice/Rats: 65–75°F
• Temperate Amphibians: 70–78°F
• Tropical Amphibians: 78–82°F
• Land Tortoises: 82–88°F
• Hermit Crabs: 75–83°F
• Bearded Dragons: 80–95°F
• Leopard Geckos: 75–85°F

Important Safety Information:

• Mini (RH-7): May be used on glass and certain “Keeper”-type plastic terrariums when mounted on the side or back wall only.
• Small (RH-4): For use on standard glass terrariums only.
• Do NOT use on acrylic, wood, metal, fiberglass, foam, stone, or custom-built enclosures.
• Not designed for aquariums, turtle tanks, paludariums, or enclosures with water on the bottom.
• Do not use cedar, ground corn cob, or walnut shell substrates with reptiles or amphibians.
• Do not place the terrarium in direct sunlight.
• Do not place on heat-sensitive surfaces (antique furniture, plastic, etc.).
• For indoor use only.

Frequently Asked Questions

Can this reptile heat mat be used on plastic terrariums?

Only the Mini (RH-7) model may be used on certain “Keeper”-type plastic enclosures and must be mounted on the side or back wall. The Small (RH-4) model is designed for glass terrariums only.

Can I use this under tank heater in an aquarium or turtle tank?

No. The ReptiTherm® is not designed for use with water and should never be used in aquariums, turtle tanks, paludariums, or any enclosure with water on the bottom.

Do I need a thermostat?

Yes. A reptile thermostat is strongly recommended, especially if ambient room temperatures exceed 80°F (26.6°C). A thermostat helps regulate heat output and prevent overheating.

Can this be the only heat source?

For some species, this reptile heating pad may serve as a primary 24-hour heat source. However, many reptiles also require overhead basking lights or UVB lighting depending on species requirements.

Where should the heater be placed?

The heater must be installed on the outside of the terrarium only. It can be mounted underneath (with elevation) or on the side wall depending on your enclosure type. Always position it on one side (opposite the water dish) to create a proper heat gradient.

How do I prevent overheating?

Elevate the tank when bottom mounting, avoid direct sunlight, monitor temperatures regularly, and use a reptile thermostat when necessary.