Quote Originally Posted by Kaorte View Post
Sphagnum moss is not the same thing as peat moss. Using a little sphagnum moss in the tub won't really increase the humidity that dramatically.
Good catch. OP did say sphagnum. Sphagnum I wouldn't think could compare to peat so far as humidity holding values. All I remember is how messy the peat was all the time. Great for humidity though.