CareStaker,
The bottom discoloration is not caused by the nutrients at this moment. It was a root damage that hapenned during 12-18 hours, some weeks ago.
If you see check them closer, the new growth isn't defficient in anything at all, and its green colour is not pale (remember it is under a MH right now). I'm slightly boosting its E.C. for the next days, but I think I won't go much over 1.4-1.5 EC for now.
Oh, great
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