Why don't you look at adding some magnesium sulphate if you're wanting additional magnesium. The stuff is dirt cheap.

I have the gallon size GH Flora series nutes so it seems even cheaper just to use the ones I have then to go buy something. If nobody has a good ratio of GH nutes then I may just have to go buy the epsom salts anyways.

But, do you agree with my diagnosis of the plant issue Grizz?

Yes, it does appear to be magnesium. do they all look that way?
I never had problems with nutrient deficiencies when using the FLora series nutes according to the label concentrations. Admittedly though, it has been several seasons since I last used it.

WEll... I do have to confess, my new aero system is up and running and for the past few days I have been using like 1/4 strength nutrients (0.56 EC/400 ppm). I went ahead and ~doubled the nutrients so they are now at (0.758 EC/530 ppm)

I guess now all there is to do is wait and see. Thanks Grizz.