How tight should the medium be packed?

[Im Just Saying]

I re-potted my newly acquired blooming phalaenopsis almost a week ago after spotting some root rot. I did end up trimming away 25-30% of the roots as they were mushy and blackened, or completely dried out husks. Unfortunately it did send the plant into shock as half of my blooms started wilting in the days after and I think these will drop soon. However the other half are not wilting at all and I have not seen anymore start to droop in the last couple of days so I'm hoping its a sign that the plant is recovering.

I bought a bark mix medium for orchids from my local nursery. I noticed immediately that the mixture is more fine than the bark mix the phal was in previously. Not being completely sure of myself I re-potted best I could trying to get the mix in between the roots as I went. Now a week later as the medium is drying out I notice that the medium in the pot seems loose. The plant is stable in there however if I was to lift it up I'm fairly certain that the pot may fall off. In some of the videos I watched it said that the bigger bark mediums needed to be packed in tighter than the smaller. At this point how can I tell if I need to add more medium? Or should I leave my poor phal alone? Thanks for your help.