brown streaks on leaves?not a burn tho.

alrite my girls have just begun to get these brown streaks on their leaves and im not sure whats goin on with them and what to do if anything.does ne one know or have seen this problem they are bout 2 and half weeks old and in a dwc setup ppm is 280 GH flora micro only and flora blend ,PH is 5.8 -6.1 any info would be great?

so youre only using the GH micro at 280 ppm? How big are the plants?

plants are about 6 inches tall already on second set of sevn leaf sets if you get that?i had nitrogen dificiency a week ago and was fixed by removing flora gro from the nute feeding so just using the micro n flora blend.

If your leaves look like the first pic (brown spots), your calcium deficient. If the leaves look like the second picture ur potassium deficient. If they look like the third your phosphorous deficient.
EDIT: check the titles of the jpeg's in case my ordering is wrong
GL!!!