right, keep an eye on it.
I'm pretty sure Repti-Bark is treated before it is packaged, but I'm not positive, you should check the label.
I got this from another forum
"Old wood does NOT have a very high
combustion point...maybe someone has the exact figure, but it's somewhere in
the 300-400 degF area"
he says "old wood" so I would say 300 deg or a bit under would be safe.
again, keep an eye on it.