The snakes head would more than likely fit in a half inch gap. Which means it will be able to pry the glass open when his heads in.
Got pics?
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The gap must be about 3mm, which won't be a problem. I have handles on all my vivs, which leaves a gap of about 3-4mm. I have never had a problem once the wedges are in.
Is the snake paying particular attention to this area because he can feel the cool air? Are the temps spot on? None of mine have ever payed attention to the gap tbh.
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