aphids

Been having tons of issues over the past few months in increasing amounts. Finally found a possible cause today. I usually use fabric pots, this is the first time I have used plastic with exposed soil/roots on the bottom. I cannot find anything on the surface of my pots, any of them. Just the...

or how to control them. Blow the pic up if ya need to see better. How long does it take to kill these fucks?? How did these bugs get into my tent? Could it be from other house plants? Could it have been from anything else in the house? I've tried very hard to be very clean and tidy inside the...