So you are running about 1.4 tbsp per gal.I just added about 25 oz to a 35 gal rez, and it's all milky now. Is that normal?
That should be a normal outcome.
I usually run 1 tbsp gal for spray, even less for systemic (res). Just don't run systemic too late, esp ripening. I prefer veg only for systemic Aza.