I do not use VPD and my room uses roughly 1500 watts of LED. I am speaking strictly from a nutrient perspective. Also, I am not a fan of ratios, I just utilize experience via trial and error. Here is a pic of my bloom feed. My feed is on par with most/all other known recipes that growers have success with cept in my case, I individually targetted each element based on my experience with previous regimens. Also, research what happens to calcium in the presence of high P. If memory serves me well, I think 321's P is in the range of 45ppm.
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