Yep, they’re all designed for foliar use from what I can tell. I just called the folks at biomin and described the use case, what I’ve been told (not always reality) is that the 1-0-0 pictured below will satisfy what I’m after. Problem is I can only find it in 5 gal buckets
@Emilya i have no doubts your recipe works and works well, my issue is a wife who will go nuts if I introduce yet another (what she considers) bad smell into our house. LOL that’s the reason for my search elsewhere, just as an fyi.
If you're in the states, you can buy 4 lbs of calcium carbonate powder from Kelp4Less for $18, but like I said, it is a strong base, even after converting it to calcium acetate by mixing it with vinegar for a day and just extracting the liquid.
FWIW, if you look over that flyer/ad you posted, nowhere does it mention hydroponic use, just foliar and soil amending. I mean it will mostly dissolve in water which makes you think it's safe to use, till 10~ days later you start getting Ca def in your leaves and you're like WTF?