Half of what’s on the books attributed to acidity is calcium or carbonate antagonism. Unfortunately weed growers, contrary to their protests to my claim, believe the accepted narrative of literally everything they hear from more than one person (or the right slick haired tight shirted expert), and boost the flaws misunderstandings oversights and general bad science to 11.
You’d be a moron to trust 100% of what someone says on weed grower forums. Unless they show you their chemistry badge.