Hey,
the first pic looks like it just might want some more magnesium
the second pic looks like light burn from a liquid being left on the leaves
the 3rd pic same as the first
Overall though they look nice and healthy I don't think you need to change up to much of anything.
Just remember when its super hot out, you do not want to be feeding them as much as they will be sucking up the water at a faster rate and can burn a bit more easily.
Best Of luck!
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