---
title: Using a heat mat correctly
description: "Using a heat mat correctly: suited to thin plastic rearing tubs, never under a glass vivarium (stress cracks). Heat from above is the better option."
---

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August 5, 2026

# Using a heat mat correctly

## Where heat mats work, where they do not

### Heat mats: uses and limits

Heat mats are mainly suited to thin plastic rearing tubs, where the heat transfers directly through the base.

Never place a heat mat underneath a glass vivarium – it risks heat build-up and thermal stress cracks. Fitting one to the outside wall of a wooden or PVC vivarium does not work either, as no heat reaches the inside.

In smaller vivariums, heat mats can occasionally be fitted inside on the ceiling – always with a thermostat and positioned so that the animal cannot come into direct contact with it.

For safe, welfare-appropriate heating we generally recommend heat sources from above – a heat panel or a heat lamp – as these mirror natural sunlight.

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