TA Nova Max bloom has Humic Acid in it already as a additional chelator.
Peat/Perlite has a better CEC than coco, in theory it should hold more and also exchange more cal/mag also other macro-micro nutrients. But i start to think that the LEDs grows needing more cal/mag supplementation is true, principally with almost soft tap water.
As I changed out my res yesterday, I somewhat waffled over my CalMg strength as GH Flora has some. My research showed that coco needs it badly so that's why I went for a full mix.
But wait there's more!
I came from HPS, albeit decades ago, and began recently with LEDs. I had no clue they were that much of an influence. By looks, mine have super small indications they want more.
Super timely post, and thank you so much for explaining it so nicely.