White splotches on leaves auto flower

[injfuel]

So I had some white splotches appear on 2 of my plants. They are the same seed type and none of my other plants(3 other plants are in the same grow area) have any discoloration at all. I thought about spider mites but I inspected with my magnifying glass and I don’t see a damn thing. No web no mites no nothing.
Im growing in pro mix hp with some worm castings added under a spider farmer sf1000 set at 28 inches at roughly 60%. Only thing they’ve been given the last 8 days is de chlorinated water phd around 6.3 and some voodoo juice 2ml per liter. Watering every 3 days.

 

[LoveGrowingIt]

The pattern reminds me more of thrips than spider mites, but I don't know if that's the problem. It does look like insect damage, though. Have you sprayed the leaves with anything? I might try an alcohol spray, especially aimed at the bottoms of the leaves.