Mixing nutrients rules? Dos/Donts

There are 2 elements you need to be careful of. Ca and Si (if used). Always dissolve and dilute whatever other nutes you have (dry or liquid) before adding the components with high amounts of Ca or Si. In general it's vry difficult to cause a precipitate at normal feeding concentrations, so the main concern is from the concentrated liquid or dry nutes before they are dissolved or well-mixed. At that point, it is of no concern. so, as long as you don't dump things in out of order or mix stock solutions together, no worries. The ingredients in fertilizers can vary a small amount, but even within that scope they are ubiquitous commodities. It's a small pool of likely ingredients. Start comparing labels of ingredients and you see it's the same shit over and over again... there are a few options here and there or maybe you use completely unquantifiable organic products that may or may not be consistent depending on a whole bunch of factors, lol... if it has a professional lable and they can guarantee what's in it... it's safe.