View attachment 1102716 Glad it is not bugs! I still cannot see the plants problems very well but the little spots all over the leaves in the second picture from the first post do look like a Calcium deficiency but I see something else in the newest picture that looks more like Potassium deficiency?
So what locks up both?
View attachment 1102718
Too much Mg but that is unlikely. It does not look like anything else locks both unless it is PH or you simply are not feeding enough. Most new growers overfeed. Do you have a PH probe? It would be beneficial to know the PH in the root zone.
5ml of Cal-Mag per ltr, gal. per plant? It does not mean anything until you relate it to what you are feeding now. If you are feeding @ 500PPM increase Cal-Mag 10% or 50PPM. 10% is a good place to start.