I like your handle so don't take this wrong! But I am afraid that we do tend to be a bit neurotic when it comes to lots of things in the hobby. We tend to look at all the parts like substrate, Ph, GH, lights, CO2 and every other little bit of the game but I'm afraid most of the fault is not in the ingredients we mix into the recipe but most of the fault will lie with the cook??
I keep telling my wife that the trick to cooking is not to be able to cook what you like but far more important to like what you can cook!