Auto Godzilla Grapefruit

I don't really see any signs of insects here... what I'm concerned about is that it might be white powdery mildew starting. Take a look at it tomorrow - or even in a couple of hours - and if the whiteness seems to have gotten worse, take some 3% Hydrogen Peroxide and mix one part to 2 parts water and spray the plant JUST BEFORE LIGHTS OUT (if I were you and you're needing to do this, I'd spray the leaves - top and bottom - and then turn the lights out even if it's not time for them to go dark - you're only going to need to leave the lights off for about an hour). WPM, if that's what this is, will quickly kill your plants, especially at such a young age. That's all I can think of here ... The other option, if the whiteness is NOT increasing, is to wait her out until the next set of leaves grows out and see if there's any difference in color ... if the new leaves look ok, chances are the whole plant will be ok.. Good luck...