Hi there. Thank you for your time. I appreciate any feedback! I am growing 3 auto haze in an 18gallon dwc. 600watt hps. Temps 80 day/70 dark. Res 62-68 degrees. Botanicare grow & karma at half recommended dose. (Switching to bloom next res change). MY PROBLEM... These brown spots started 2 wks ago. I adjusted lights, fans, nutes, & temps. I fixed a few other issues but these spots are slowly starting to appear on newer growth now. And the leaves that were damaged early on are now yellow and brown all over. I looked up thrips bc I found 2 little winged critters on the glass in my hood. So I am getting the Hot Shot No Pest Strips from lowes tonight. But do these bastards cause the leaf to turn brown?? If not what else could this be? Pics are below...have to restart my phone so it finds my sd card.