Seriously, I use calcium nitrate, epsom salts and a dry nutrient mix with micros- in my case, Hydrofarm.com 5-11-26 'hi K' formula. For bloom I add a dash of MKP to the base mix.
Chems are chems, the main thing is to mix your calcium nitrate separately to avoid flocculation. Mix by weight, mixing by volume is dangerously inexact.
After all, everybody here already knows how to use a scale, Riiiiight?