I have ten little girls that I acquired as clones. They're potted in FFOF and I'm giving them RO water ph'd at 5.8, under 400w MH. They had a slight case of powdery mildew so I introduced a (DIY) sulfur burner to the room. After four treatments of about two hours each, it seems to be under control. Lately the new leaves have been looking sorta distorted. Today I removed several leaves that have voids near the veins (see photo). Anyone have any idea what's going on here, could it have anything to do with the sulfur? I am not adding any nutes when I water.
looks like nitrogen deficiency but im not 100% on that i looked it up and it sounds like what ur plant looks like so