second insect!!!

Yesterday and today morning I found 2 very small insect with wings (I dont think they are mites as they were more brownish than white)

They were jumping on the soil although they had tiny wings...

what are they? how can I fix the problem? This is my first ever pest problem

put (clean) sand on top of your soil. they can't live in that.

would sand from the sea work? should I put it in the oven/microwave to "clean" it

Thanks

soil, wings? oh crap... fungus gnats! You'd better get a handle on them quick or they will be laying eggs and the larvae will suck the life out of your roots. For a quick fix get some no pest strips, the sticky flypaper kind. Be VERY careful if you get an insecticide; remember you're going to be smoking what you're spraying and most insecticides will kill marijuana - don't ask how I know.

Shit!! How should I deal with it? I don't just want a quick fix, I want a permanent fix. I will be putting the sticky paper, what should I add to my water just to kill them?