What is this?

What seems to be the issue with this plant?

Room temp is about 80, grown hydroponically in a bloombox kit, 6 week of flowering, plants are about 4 feet tall and stretched for some reason. Not my grow thankfully

Just took a closer look. Spider mites. Horrible infestation

How did it get the spider mites?

6th week of flowering......damn. Not sure what I'd do. I guess get temps down to 60's then.....kick some random dudes ass because I'm angry then buy 1 billion predatory bugs and hope,for the best.

Kill a plant that is totally infested...unless you want to spend 100$ on making a hot chemical dip for just one plant