Can't tell if I have a nutrient issue, infestation, or something else. Help

I've been adding cal mag (cali magic) about 2 ml / gal every feed, feeding twice a day using AN Sensi along with the rest of their lineup. Just switched to bloom nutes right as the issue was propagating, so I want sure if I should add more grow for more nitrogen or keep with the bloom.. never grown autos before. Think that's a necessary thing? Maybe half/half grow/bloom? Also my ppm was 700-800 last 2 feeds, I dropped it back down to 600 today thinking maybe I overdid it. Runoff shows consistent 5.8 PH, so I'm confused to think it could be that. I've been seeming to have issues since the beginning with these.

I’ve had a similar issue with my first grow, for me it was an issue of wind burn with fan too close but could also be a cal mag deficiency

hi, first pictures look to me like a potassium deficiency. the plants in the pictures look over watered. cheers

Nice diaries and plants! I'm seeing a few things pop out regarding your problems. Potential overwatering, is causing droopy leaves. Nute lockout caused by PH not at optimal range. Top new leaves are yellower indicating a zinc deficiency, likely due to PH not allowing for good nutrient intake. The lower spotted leaves seem to be affected by magnesium and nitrogen deficiencies, again probably your PH. Would recommend focusing on the PH so that your nutrients can provide more for your girl.

Looks like nutrient burn. Cut back on that. water with plan water. It will bounce back. Watch your PH too. pH has more to do with this. Make sure that’s perfect

So I tried hitting twice with Smite just in case there was a mite issue. Could it be a nutrient issue, mold, something else?