White widows canoeing leaves what do?

Aloha. My white widows were doing so well think I had burn them too much with nutrients but I don’t see signs of pests . Has spots on leaves now they are getting better no spots but they are not really growing new leaves in last 3-4 days . Anything can do to get these leaves darker and not canoeing??
First 2 pictures is what they looked like 4 days ago . Last pic are what they look like now. Just been adding water and some cal mag with armor si . Any way to get these back growing good??

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Those are previous issues from earlier in the grow, looks like they’re all lower leaves. All top growth looks good, so I wouldn’t worry too much some lower leaves. The lower damaged leaves won’t recover.