Where did it first appear? Top or bottom

I have been fighting a fungus gnat invasion. Wife has dozens of houseplants that she overwaters. I survived a bad wreck a few months back. I had her put 1/2 inch of sand on the top of her houseplants soil. I mixed up some Peroxide drench ( they were everywhere) and drenched the top of all 6 autos . I've since let the blooming ones dry out to droop each watering and since 4 are in fabric bags, I bottom watered them for 2 weeks. The 2 in 3g pots, that just started popping pistils, I transplanted to 5g and added fresh soil. I see your leaves fading but none of the brown spots and wilting that I had. Put out yellow sticky traps to gage your infection. I dunno, but, from the look of yours it looks more like something else. Wish I could help more. Here's a Pic of the one that got hit the worst. Luckily it's a fast finishing strain. If it is gnats you're doing the right thing drying them out. Mine were in 3g fabric that needed water every other day and the gnats flourished. Good luck!