yellow cracks in leaves

just like it says i have yellow cracks in the leaves of my headband plant and in other places it looks like somethin has been chewing on it a lil bit. I searched the whole cabinet no bugs,moths,nothing.
im 3 weeks from seed and im doin DWC in roughly 2 gallons distilled water with flora nova grow,floralicious grow, and diamond nectar
ph 5.8
ppm 320
res temp 71 deg.
inside cab temp 75-78 deg
humidity 37-40%

here is a couple pics

cant quite see the cracks homie but i couldnt tell ya just stoppin in to take a look

this is not a real problem, leaves crack from excessive wind and the edge scars up, thus the yellow tint. It happens with every plant, not just pot, my banana tree, my tomato and pepper plants. Whenever a big gust cracks a leaf it does this don't worry about it.