Orchid roots

[Royal]

My opinion is the more roots the better. If you're not growing good roots, maybe there is a better medium out there for you. If they like the sphagnum and are growing good roots, just not into the bark, than forget the bark and go with all sphagnum.

Have you thought of mixing some bark pieces into the sphagnum? That might give the plant more to anchor to and more of what it like to grow it's roots into. Just a thought.