Hey alfonso2002,

Sorry I did not respond to you earlier....I guess I lost the thread for awhile.
Or I've been lost in the eggnog for many days.

I'm not sure what's in Fox Farm nutes, so I'm not sure what to tell you about those additives. I use DutchMasters gold, so I don't need to add cal/mag since there is plenty in it. As for SuperThrive, save your money you don't need that stuff, the plant will make all the hormones and vitamins it needs.
As to TigerBloom or GrowBig, I really am clueless but I can tell you that in aero there is nothing between your roots and your nutrients. Whatever you use is going directly to the plant so things do happen faster (like over fert etc) and will show signs sooner.

I just checked the DM site and for that line of nutes they clearly say 5.5ph for aero, you should see what FF says for thier product. Also see what they say is in it and why they recommend the additives. It seems to me pretty much everything you need to grow a plant should be in the nutes.

Could you give me some idea of what aero system you are using?
Brand or DIY system, etc. Partly curiosity on my part but also for me to get a feeling of how your system works.

OM