I don't experience S deficiency. I suspect the plants are getting their needs fulfilled by the manure. I don't use Epsom salts but I have them in reserve should the need arise. As for JC, I know he gets much of his information from more informed sources (ex: Chimera wrote the section on breeding cannabis).
M.
Maybe off topic but how bout using sulphuric acid for ph down, would this add enough sulfur?
you can't have sulfur in a 1 part, because the calcium and sulfur form CaSO4, which is Calcium Sulfate aka gypsum which is abound form of calcium and sulfur. Although the roots are still able to absorb this in this form, it would clog drip system and is not ideal for liquid feeding
I posted this in another thread, but I'll rehash it here
it appears you are right.Interesting. Though I am pretty sure the CNS-17 line has Ca and S in one bottle.
FloraNova uses coal slurry to make this possible.
Floranova uses polysaccharides (sugars), like CNS17, for suspension.
The coal "slurry" in FloraNova is leonardite (humid and fulvic acids), not for suspension, but used to chelate.
Your explanation seems plausible, but their sales rep must have been confused when explaining how they could have a complete 1-part.