Need advice as soon as possible. Please see last f...

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Hey there jinks, Doesn't really look like a nutrient issue mainly because the discoloration has sharp edges and seems "targeted" meaning I think you might have two problems , the main problem causing hat on the leafs could be pests, could be white fly. To fix white fly just make sure you follow a very strict wet dry cycle especially the completely dry part of the cycle. The dryness will destroy the eggs and the white flies eventually kill themselves on your light or get sucked out the exhaust. If it's not white fly you probably want to add something like nematodes for example BTi . Second problem I see is the start of a kegnesium issue, this you can see from the yellowing of the tips of the serrated edges of the leafs and the yellowing between the veins . The magnesium issue is due to the intense light schedule meaning the plant needs more Mg. So you should increase the mg in the feed or add it as part of a twice weekly foliar spray. This will treat the symptoms but to treat the cause you need to reduce your light schedule (I know you don't want to hear that) ... Hope this helps growmie ! 🚀