these little critters (mag 30x) are infesting SWIMs plants
Poor plant, kill the little shits.
Back when SWIM grew SWIMs own, SWIM encountered the same type of problem. These little bastards are called Thrips. What your friend, SWIM, has there, is a deadly case of thrip larvae. Should they become the truly annoying flying adult-versions, they'll eat up SWIMs plant's roots. My friend SWIM, recommends that your friend, SWIM, does his best to irradicate them. I forget what SWIMs real cure was, but I do remember that they did love Sugar+Water.