The plant looks pretty good but you have two problems as I see it:
1. More minor is the pot for a Dendrobium is still too large.
2. The chunks of media are too large. It will dry out much too quickly.
Plus those nuggets are pine bark. Pine bark will cause harm to any orchid potted in it. Pine bark has to much resin or sap. The sap will kill the roots. The appropriate bark to use is fir bark. Fir bark comes from the Douglas Fir tree and does not have resin in it. It is a pronounced reddish brown in color. The particle size should be 3/8 to 1/2" at most but what I see are bark chunks or nuggets which are 1 1/2"" or larger. These pieces are too coarse, they will dry out much too quickly.
