How about this...
step 1) Buy a scale
step 2) mix the following by mass:
3 part KNO3
8 part Ca(NO3)2
9 part KH2PO4
4 part MgSO4
1.6 part FeSO4
0.6 part KOH
This really isn't rocket science. People are already mixing 3 bottles. Is 6 chemicals really that much harder to experiment with than 3 bottles?
That mix is my 9th iteration and works great. If you think it needs more or less of something, adjust the formula and experiment.... No need for calculations... just guess and check and do what seems intuitive. Instead of adding more "bloom booster", you add more KH2PO4.
So I have my scale and I added up the parts and it came out to 26.2 parts. I divided that by 3.142 and got 8.34. I divided the 4 parts of Epsom salts by 8.34 and ended up with .479. Should I have multiplied the Epsom salts because I don't understand the answer. Maybe I need some B or Mn or something. I didn't see any Cu either. Huh.....I'm confused.