I'm confused as to how over feeding can result in this sort of leaf loss. It's not as though the leaves' edges or the spots turn yellow/necrotic then break away leaving holes and deteriorated edges. This happens overnight (when the lights are off). In fact one of my plants is now showing minor nitrogen/potassium deficiencies (easily corrected, but a sign that over feeding is not a problem). If the leaves look dark it is because of my camera and/or your screen. Also cut leaves get dark really fast and the pictures show leaves that I pruned to get a better picture in more natural light. LED's distort color significantly.
In any case, I can't tell you all how appreciative I am for your many responses. It's really great to have a community like this to turn to for advice. Please keep the comments coming!
Thanks!
Nick
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