Bump to this, some Scott's 100% peat was carried at my Home Depot and it contained only 100% peat with no additives, I would steer away from mulch as well.mulch in general is a poor substrate choice for tarantulas.
i personally just use unfertilized peat moss. you can get a huge compressed bag from home improvement stores for under $10.
The oils in pine and cedar can be toxic to most exotic animals. Cedar is often used as an insect deterrant so imagine if you housed an invertebrate on it. Just stick with soil or peat or coco fiber. Its a much better choice.Someone told me that Fir could be a dangerous substrate, Is this true?
I know that cedar can be dangerous but is fir the same thing as cedar?