Hi
@con - had some time and catching up. A word on autos and calmag - I’m sure in shock to hear that you’ve never used it. You must be the luckiest auto grower alive. Calmag, imho, especially with autos, is 100% essential and indispensable. I believe autos use more Ca and Mg (and Iron is yours has that, mine does) than do photos. And under LED the way we do, if I don’t use calmag with every feed, I begin to get issues. From start til about 2/3 of the way through flower I use it every single feed, and it goes up with the feed schedule progression. Right now all my plants get not only the Calmag product in the Remo and Cyco, but also a 5 mg shot of my base CalMag plus Iron (Humboldt’s Secret). It’s only 2-0-0, so it does not overload the N. You see my plants.
So imho, you might be well served to grab some and try it on a plant. Calmag corrects a lot of issues and more importantly (I think) it PREVENTS issues from arising. My two cents.