Chilean Sphagnum Moss (100g Bag)

Is this safe for carnivores plants? Basically want to make sure there’s no pesticides or mineral salts in it. I assume it would be safe if used w frog

How often do I need to change it out?

I heard that dry moss can revive at certain conditions. Is this moss can be revived ?

What is the quality level of this moss? 3A? 4A?