You're dealing with a more managed approach. I grow in raised beds outdoors. They are four years old now, and have been built up with steer and mushroom compost every year, which I augment with a general garden fertilizer (Happy Frog) for the veggies, Botanicare for the weed. With both, I use less than the mfr recommends. I have winecap mushrooms introduced to the beds, which eats and degrades the compost in situ, giving even better soil, and tasty shrooms. It is now some pretty good dirt, if I do say so myself. :-) I have to generally manage the pH down slightly, as the steer compost I use seems to be a bit akaline, and my water is alkaline. I just keep an eye on it, and lightly adjust if needed in the spring. Call me organic lite.Yeah it's not to adjust the ph of the soil. Just the nutrients. And I agree with you those are great options.
Reason being say if you add silica to nutrients it will precipitate some out like iron and calcium because silica will shoot the ph up close to 9. So you add the silica first and ph it down to like 6.5 or close to where you are feeding at. Then add the nutrients and that way they don't get precipitated out.
Hydro different story
I had to adjust two of them pH up in their first year, for which I used Lilly soil sweet, and one down, aluminum sulphate did the work. I checked with the afore mentioned Home depot guage, applied about 3/5 of what the directions recommended, watered in, and checked again after a day. Add a bit more if needed, check again. etc. The volume of dirt involved makes a liquid treatment impractical for me. If you are in containers, I defer to your experience.
Just read your post again: I never worry about the pH of the nutes. I pay Botanicare to take care of that, and their product works for me.