I’m going to make up my own hydroponics solution. Looking around the web it is hard to find a site with a recipe.
Here’s one at U of Wisconsin-Madison:
0.4 NH4H2PO4; 2.4 KNO3; 1.6 Ca(NO3)2; 0.8 MgSO4; 0.1 Fe as Fe-chelate; 0.023 B as B(OH)3 [boric acid]; 0.0045 Mn as MnCl2; 0.0003 Cu as CuCl2; 0.0015 Zn as ZnCl2; 0.0001 Mo as MoO3 or (NH4)6Mo7O24; Cl as chlorides of Mn, Zn, and Cu (all concentrations in units of millimoles/liter).
Good information from UIUC