I'd go with a multi-faceted attack. Removal - by hand, by a strong spray of water if feasible, and at least two different commercial mite-killing products (and, of course, the usual several treatments so as to be assured of killing both the ones you see now and the ones that'll be hatching from eggs in the near future).
If the medium allows for it (IOW, not something coarse like 1/2" expanded clay balls), maybe a good layer of diatomaceous earth on top of each and every plant's container to carve those little SoBs up after they hatch and are crawling to the plants, lol.
I hate those critters. And I would NOT assume that they are confined to that particular grow room, either. Treat every plant in your house (or at least add a layer of diatomaceous earth to each one). For that matter, do your carpets too, your yard, whatever you can. And then start hosing yourself off from the waist down before you enter your home (every time) right up until harvest. And I hope you have better luck than I did last time I had an infestation. I think, that particular time, that if I'd have burned the place down... that there'd still have been mites everywhere.
If the medium allows for it (IOW, not something coarse like 1/2" expanded clay balls), maybe a good layer of diatomaceous earth on top of each and every plant's container to carve those little SoBs up after they hatch and are crawling to the plants, lol.
I hate those critters. And I would NOT assume that they are confined to that particular grow room, either. Treat every plant in your house (or at least add a layer of diatomaceous earth to each one). For that matter, do your carpets too, your yard, whatever you can. And then start hosing yourself off from the waist down before you enter your home (every time) right up until harvest. And I hope you have better luck than I did last time I had an infestation. I think, that particular time, that if I'd have burned the place down... that there'd still have been mites everywhere.