Hey Neko. They're getting there man, I wouldn't be a rush to pull anything just yet.
I'm using Humboldt equilibrium for cal mag. One thing I noticed with my Dark Devil and subsequently carried on with the Narco & akr. When I give them there first full water (2nd set of true leaves) I start with a light dose of eq. I might be wrong but with the notorious deficiencies using leds I get it in there from the start.
I agree. After my first run in with cal mag deficiency, I started off with Botanicare CalMag from the gitty up!
You ever tried making your own fem seeds, Neko?