First time grower here, no nutrients have been added. Any idea what this might be and how to fix it. Thank you

@Mr. Grow It it is fairly close, I will try moving it farther away. I didnt know that was a thing. I'm still learning it happened soon after I introduced the c02 could that affect it?

@Diana Thomas Ok, it's probably that. No, adding CO2 would not cause your leaves to look like that.