Oh, those are very bad news. By the time you see them crawling on the surface or on the pots, you probably have a bad infestation, and they can be almost impossible to get rid of. When I had these a few years ago, I had to shut down for 3 months, disinfect EVERYTHING with bleach, and start over from scratch. I once had an infestation that I caught early, and knocked that out with Bayer Tree and Shrub, but I think I got lucky.
One thing you might try is soaking the medium with a 1% peroxide solution once a week. That won't eliminate them, but it probably will keep them under control in your roots until harvest time. Then, you launch D Day and declare total war.
One thing you might try is soaking the medium with a 1% peroxide solution once a week. That won't eliminate them, but it probably will keep them under control in your roots until harvest time. Then, you launch D Day and declare total war.