Can anybody help me identify what the problem might be?

There are blotches yellow scar tissue appearing on my leaves for some reason. I have sprinkled some DE all around my plants and some got on the leaves. Could the DE have burned the leaves?

http://imgur.com/a/HbPJ1

All the other leaves look just fine and the plants are healthy. Its just a few leaves that are affected in very random places. I may upload more pictures tomorrow when I can get some good lighting.

Here is a link to my grow journal, https://www.rollitup.org/t/4x4-1200w-mars-hydro-ii-my-first-grow-log.919588/#post-12918407 .
dsc_1073, dsc_1074, and dsc_1075 are the three closeups of my black widow. You can clearly see the plant looks fine but has these weird yellow marks on the leaves and I cannot figure out why?!