Hi thses guys looking like Springtails, they eat dead organic material. To get rid of them you can set some Predatormaites like Hypoaspis miles or Hypoaspis aculeifer.
You can drown them ( taking the hole plant into a bucket) and fill it with water, then they drown in the water You have to transplant the plant after to get rid of all of them......
So its good that yo are still in vegetation satge, I think your Plant can handle it to get 30 mins her roots under water. But i would order some predator mites too