Hi - so just wondering if anyone can give me there...

they look very sad.. as there is no diary we cant be of much help as it not always the obvious cause, for you i would use process of elimination, if its not watering thats a mess or lights or size of pots for root bound or you have not give enough feed or too much you should know this and change accordingly. for feed and ammendments just raise or lower depending if you think uv been giving too much and vise versa. 1mll calmag, throw some molasses in there for good luck. to high or low temp you will know and correct same as to high humidity... change 1 thing at a time as to know the problem.

Without a diary or a LOT more information about what you may or may not be doing, it is impossible to answer this question accurately. Either pH or fertilizing is way off, is about the most help you can get from your limited input.

Nice thing you got going bro, Have you checked underside of the pot for roots protruding out to make sure they are not rootbound ? They are quite tall already, the pot doesn't seem so big in the picture it's hard to tell what size they are. Just dropping a hint , good luck .

Symptoms show low N and maybe low k in last pic? Can't see well enough but if there's a pattern of damage around the serated/margin of leaf, add that too. It's good to be patient, but once you see the progression and it points to a particular cause with confidence, react sooner. Letting it travel up the plant for a week or 2 isn't necessary.