Pests in the medium

[TheHYPO]

I recently (unintentionally) ended up overwatering two of my Orchids. (i.e. they sat in water for around a week before I realized). I know that I obviously need to let the bark thoroughly dry out.

But in one of them, I noticed I now have some dark grey bugs crawling around the bark. They are very small. Maybe the width of a grain of sugar, but more shaped like a grain of rice. It looks pretty similar to pests I've seen in office plants which have been overwatered which generally resolved itself by allowing all the plants to dry out for a little while and letting the pests die off. I don't recognize (yet) any of the pest problems that seem to be listed on the orchid sites (webbing or discolouration on the leaves).

Is there anything else I should/could be doing to eliminate or protect against these?