Ok...so comprehensive is that kinda like has all the macros in it I need for most low to medium light plants? And trace us well...trace elements then?
I believe comprehensive does include everything, but it is quite minimal.
You are better off using the trace mix that Seachem has, and then using their NPK line.
Pfertz makes some liquid fertilizers too.
ADA has liquid fertilizers as well.
This is assuming that there is absolutely no way to just buy the chemicals, make up the solutions, and store the excess at work/in your car/elsewhere.
To be honest, ingesting the chemicals is going to be less toxic than some of the other household chemicals that can be found....