Few things:
Take the blower out of your intake. IT will work better as a passive intake than as a mismatched active.
Your runoff is way low and you are locking out nutes.
You added the big bloom to the SOIL? Ooooh not good. And you are not giving actual fertilizer?
Read the flush sticky at the top of this section. Perform a full flush, ending with your base nute at 1/2 strength pH'd to 7.0. Your soil pH has dropped and you need to raise it. Potassium gets lokced out and your pants become susceptible to fungus, and yield suffers big time.