Can In ask what the soil is?? if it MG(Mircle grow) then the soil has been to wet and there will be small white wormlike bugs in there. I had the small white bugs,,so I let the soil dry and this seemed to kill them. they ended up in a water trough I had in the veg room to raise humidty. a water tray will make them jump from the pot to the water if you let the soil dry out. I dripped a drop of bleach in there and it killed them all. thats into the trough not the pot. I dont recommend that..haha.
and any of there comrades that followed into the water were killed instantly. The white bugs I had didnt seem to do any harm to my plants,I didnt like them though,. so yeah try letting the soil dry and that should get them.
Just my exp./