Mate if you use just a nip of cal/mg supplement all the way thru veg & bloom until the week before flush.. You'll be golden.. I use Advanced pH perfect chem nutes so its sensical Grow or Bloom I use as a cal/mg supplement..
It says on the back of the bottle 'if you use Advanced base nutes you wont need this product' thats bollocks under LED grow conditions.. now saying that I normally use it at only quarter strength.. 1/2 ml per L.. So I'm not going over board.. & that seems to keep it at bay for me.. Cal/mg def is the bane of most LED grows..
Now I know you're organic.. (Bio bizz) So you'll have to see about biobizz's cal/mg supplements.. Or something like it.. I'm pretty sure the sensical I use is chem.. So no use for you bro..
:smokebuds: