I'm very Familiar with spider mites, last year i had 2 plants i was experimenting with and i had them in my shop, they act fast as soon as i seen them i ordered some organic spray from amazon and the plants got over run by time the spray got here and you can usually see spots on the leaves and see them crawling around. I'm being really cautious because my wife has MS and is the main reason i grow, Plus i love growing too, lol