Leaves brown down the length of half the leaf

Hello, I think the one leaf that has the odd split is just a random deformed leaf. Pluck it. The leaf below it that has the sorta whitish lines and squiggles going down the one finger can sometimes look a bit like leaf miners, but it may just be a light starved part of the plant which often yellows and dies off, you could pluck it also, then watch for any other leaves getting any symptoms. Sometimes over treating can be worse than waiting and watching. *the only photo that makes me wonder, is the 5th to the end, the coloring between the veins...that i usually associate with magnesium. Biobizz did recently put out a calmag and i do recommend making it part of your weekly diet, calmag really helped my leaves look much healthier. 👍