With the questions you are asking and with the stage of this plant I would not recommend S/H at all. I would simply repot up to a larger size pot. I would tweeze apart all the old bark that will come off without tearing roots apart. I would reset the plant in a new, large pot, such that the growing point is furthest from the edge of the pot. Dump in the bark mix and water away. That's what I would do!
Guess I'd also water with a strong mix of KLN, but that's just me!