Black Bugs ???? Not on ANY plants tho

Ok so big Problem. Walk into my grow tent everything is great mothers are happy teens are great everything is smooth an gorgeous. Then i notice what looked like soil in the empty corners of my tent. I was like WTF so go to clean it up an it starts moving. Me being a clean freak i wigged and got severely pissed off. Got my Magnify an Micro out an These little bastards look like spider mites so being the clean and hospital freak type person i am i went through EVERY Leaf on EVERY plant NOTHING no bugs no nothing on the plants. Havent seen any in the soil either but these things are infesting my grow tent corners. I vacuumed them up an 15 minutes later whammo they were back. What the heck could these things be? Ill try to nab some photos tonight not sure if i can get a close up enough to show with out any blur but ill try. but in the mean time seriously worried as ive babied my girls and i really dont want everything to go down the drain. This all happened right after transplanting obviously everything was fine before i swapped them into Ocean Forest Fox Farm Soil. Now i got bugs WTF? Can anyone help me please.

so are there any in the pots? some pests have no interest in leaves. pyganic/azamax rotation pretty much takes care of anything I've noticed. the pyganic safe for mammals .

oh sorry, I just had a type of "surgery" and didn't read completely.

your posting fucked me up at "hospital" , I hate those fuckers. sounds like the grow tent cockaroaches! good luck and the info on the pyganic is still pretty sound I think. you could even use a more toxic/cheaper solution since you're not in flower.

Thanks. and No there is nothing in the soil or pots or anywhere on the plants. We Sucked em up with the vacuum then 15 minutes later the little bastards were crawling around again. Ive never seen anything like this. Will Mighty Wash Work? I know its for spider mites but im kind of 1 confused and 2 concerned. Ive got 2 4ft tall Mothers in there an a Bunch of teens around 3ft I dont wanna lose them.