lww, you got it. I would personally choose to sequester that plant entirely as you are correct, they will travel & any pot/medium is choice for them. There are apparently people who keep super moist bathrooms, wet basements, or the like, & have springtails take hold & grow into massive populations. So, this is evidence that they can even come from the outside into your home- they travel. lloyd, I agree, almost like mites (or any insect population) in that once they take a hold, one can never entirely eradicate them. Population control becomes the game. Again, they aren't really bad for the plants, just an annoyance for us. It is my experience that they are even resistant to pyrethrins. You will need to kill with a pesticide all those you can see, perhaps some stickies near the pot tops too- still spray @ every watering. This includes tray/runoff catch/drain/etc- anywhere they may go & take residence. Drench with a neem product as this will act mostly by disrupting them hormonally- can't eat, breed, move about. Doesn't kill on contact or immediately. Can try Hot Pepper Wax Spray as a local deterrent as well. Diatomacious Earth is effective as a barrier but must stay dry, which also means very dusty (think super fine talc powder). It kills by cutting the insect bodies, and if they eat it, ripping up their guts. For soil drench, neem is best bet, lest you go agro-chems... bad. BTW, just mixed up a batch of Azamax, as had, just never used it. It too clouds the solution. I mixed a 730 solution at 5gal with Azx @ 60ml. The low recommended dose for soil drench is 2.7fl oz vs my 2oz mix (the high doubles it, but...). Soaked a few plants in 2L pots. No burn, no curling of the leaves. No pH and/or ppm effect to the solution. Added at the end of mix. It is oily, but no where near that of regular cold-pressed neem (bioneem, einsteins, etc). Very slight odor comparatively. Emulsifies well. Of the neem products, I like workin with it the best. See how well it works...