I just noticed on another thread you mentioned coconut fiber being a risk for respiratory infection due to it being dry and powdery. The plantation soil is coconut fiber or husk, I'd have to check again, but it is fairly fine. It's not dusty, but is this still a substrate which could be problematic?
Also, in continuing to look into UVB: is the advantage of UVB that it stimulates the frog's appetite and normal activity as opposed to being a "health essential?" If that makes sense...