His recommendations are pretty much generic directions for people just trying to get a harvest
After the first couple weeks of growth I never cut my nutrients.
Even autos I feed full strength.
But I’m no expert with autos.
Start with 1/3 strength until they build some roots then raise it and just watch how they react. If it becomes too much we can dial it back.
Calmag I’d use every feed , in plain water first.
Potassium silicate says it has trouble mixing with nutrients if not defused properly.
From experience it takes an hour for this.
I don’t like risking a clumpy batch of nutrients so I keep them separate.
I find once a week in plain water after feeding more than enough to strengthen my ladies without an adverse reaction.
Your basically avoiding the chance of a bad batch of nutrients.
Hope I didn’t forget anything.
Let me know.
Stay safe
Bill284