It's not that the probe is easy to knock over or move, rather it's that I originally made my rack for leopard geckos and the tubs would have been smaller, allowing for enough space to completely get the probe under the tub. With these bigger tubs, I can only get the probe just barely wedged under and each time I move the tub I have to reach back and set it into place. I don't trust anyone with doing that. I do suppose I would have a better rack by then though
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