Well, yes, but also in various post here and there.
Max levels I've done:
Fe as Flourish at 200mls in a 20 gal tank
Mg 10ppm thus far
KH 0 to 18
GH to 24
CO2-> who knows but 30-50ppm is not unheard of.
Light, about 1/3 full sun (700 umols/m^2/sec)
SO4 to 100ppm
O2 to 17ppm at 27C
I need to work more with Cl, SO4, Mg and some other traces(Cu and Zn, and Mn).
You can get some of the info on each nutrient article I've done aqnd see the references and resource for further info.
Only the high NO3's, above 100 caused any death and then only to amano shrimp, wild soft water SA fish where unaffected after 3+ day exposure to high NO3's, over 120ppm or so.