These are "springtails", eating dead root zone stuff and turning it into something beneficial for plants,I believe.Because I haven't had any problem with them so far.They seem to do their business for a period then suddenly disappear which I find very interesting.Maybe because of the enzymes I use,there is no eatable stuff left in there after some time and they get lost.You don't have to do anything,they won't do any harm to your plants.