Leafs

fim'ing isn't a real thing. either you take a single (or more) node off or you do not. any auxiliary bud below will get increased growth hormone in the ensuing days. if you only clip the leaves, it doesn't do anything. at best, you are trying to clip a node and save 1/2 day maybe 1 day for the time to grow out slightly from that new node, but more likely slicing into a node and slowing it down. Regardless, you cannot make more auxiliary buds than what exists on the plant by cutting in a magical spot. it's just lazy topping, not "fiming" Get the pH under control, first. then, give it even more time to recover. If the spots have stopped spreading, it's likely healing. you pretty much made it 99% certain what the cause is. so, don't dump stuff into it to try to fix a "deficiency" or something.

Yes that is probably due to your pH. Keep an eye on the new growth if it's looking good you have already probably fixed the issue. It's looking like a good grow. I tried fim and topping this grow. And honestly I'm not impressed at all with the fim technique. For the scrogg I am doing the topped plants have done so much better! If you have any time check out my grow! Cheers and happy growing!

They look good to me