Nutrient chart or meter

Growing cannabis Hydroponic.
Using innovative plant products 3 part nutrient.
Using the chart, 2 table spoons of each in 14 litres water.
PPM 680.
Transitioning to flower. Humidity 48%,
PH 5.8
My question, to the best of my knowledge and from what I’ve read
Nutrient should be 800-900 ppm veg, 1000 1100 ppm flower.
Using your chart seems like Im under fertilizing.
Should I go by ppm meter or your chart.

What chart for what nute line? Your ppm meter tells you the story if used properly

Comparable to general hydroponics.
Innovative plant products.
Meter range 0-999 ppm.

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