Which elements can and cannot be mixed together?

I'm hoping to simplify my fertilizer mixing regimen, but I'm unsure which elements are safe to mix together. I use the following dry fertilizers

Maxi Grow / Bloom
Epsom Salt
Calcium Nitrate
Potassium Silicate

Can I mix any of those dry powders together in my blender with hot water and then toss in the reservoir or do they all have to be mixed and added separately? I have been mixing and adding separately. I add in the following order: Potassium Silicate, Maxi, Epsom, then Calcium Nitrate.

Calcium Nitrate is one you always wanna mix with a volume of water before adding to other nutrients that are also already in a volume of water.

The Potassium Silicate is another that I suggest mixing seperately.

With RO water I always added potassium silicate first, then calmag and then gh flora micro, grow, bloom. When I switched to tap I learned that if I added the potassium silicate first that when I added the grow I would get a ton of precipitate. If I added the potassium silicate last it didn't happen. So the potassium silicate can be problematic.