This isn't about you, it's about HIM.
right.
Because if you rely on testing runoff for factual EC, it is 100% likely that you will get a misreading for a variety of reasons I would be happy to lay out if your really interested. Standard operating procedure is to initiate a "fix" protocol that usually does fuck it up.
Because science my friend. Ph naturally drifts, we absolutely count on it. In fact I feed ec in accordance of knowing exactly my drift over a 72 hour period. as you know, different elements uptake at different ph, if you don't have drift you'll miss something.
For a loose example, Maganese, iron, boron copper and zinc tend to uptake between 4.5 and 6.0 ish. Whereas Nitrogen, phosphorus, potassium, Sulphur, calcium and magnesium uptake starting around 6.0 to 8.0.
That's why 6.0 is a pretty safe spot for most mediums. Some will vary higher or lower. If your tap water is going in at 7.9 like mine, and I used it (like this grower did) I would be unable to uptake any needed trace elements like Maganese, iron, boron copper and zinc .
My bad, I already get accused of writing books, And yesterday you said 50% of my information was wrong. hmmm
I would guess.