What is wrong with my baby?

DWC outdoors

Week 2 flower
Anyone know what's wrong looks like PH Flux but I'm sitting @ 5.9 with rain water. I upped Ppm but the plant is eating more then enough when I check the ppm it dropped 100ppm in A day.

Any advice?

Id say, nothing if you only have a few leaves like that.. your outside, leaves get beat up... Remember in hydro you can always correct most nutrient problems by simply mixing up a new baseline mix for your reservoir and change it all out...

Wind burn.

The leaves go crispy where serrations rub against each other in the wind.

did it get water or nutes on it when the sun was out ?

that normally does that

It did rain a couple day ago and the ph of my rain is 7.0 Idk if that was it tho. The ppm was around 670ppm when I switched the Resivoir. Next day it read about 560ppm so idk if I overfeed cal mag. But it's only on a couple fan leaves. The plants have already hardened off so idk about wind burn. My guess was bugs but I've only ever had to deal with a couple aphids here and there. I went and caught a couple benifical bugs and added a gallon PH 5.8 water to the Resivoir. My benifical bugs are hunter spiders for now.