Been a while, plants definitely seem healthier. At this point, I'm not quite skilled enough and can really see the minute details that would edit/change my dosing. Anyone want to chime in on how these guys are looking?
I just went back to the first post on 10/2 -WOW things really have improved.....congratulations! Looking at the new growth I see, good leaf shapes, good leaf sizes, and good color - just what we want. Now watch these new leaves as they mature because magnesium deficiency issues show up most often on older leaves (although the entire plant/stem can be effected). If the new growth continues to do well as it matures and doesn't develop interveinal chlorosis or drop leaves early I would say you have resolved your issue(s).
At this point I would do a quick 'snapshot' of your current dosing levels and water parameters (pH, dKH, dGH, nitrates) so you can replicate the conditions in the future if things go 'sideways' somewhere down the line. If the current dosing levels continue to show this kind of results I would not recommend changing them. Best of all you now can recognize some of the symptoms to watch for in the future.