well about the calmag and K... by what i understand from what wairia told me is once the coco has absorbed all the calmag it can it then in turn dumps alot of K into your substrate. but yes it does require added calmag in coco. i ran coco and LED's haha calmag hogs in coco!and yes i use silica (Advanced Nutrients Rhino Skin) and love it... branches are as stiff as coat hangers and can hold up them heavy buds
Ah, yes, @Waira knows his ganja growing!!
I've added some AN Sensi CaliMag (or whatever it's called) to my shopping basket to go with the AN Sensi Bloom Coco.
I think it's NPK 4-0-0 or something, so will use it as a nice veging addition early on.
I think maybe we're talking about different things for the "silica".
I mean those water retention crystals that start hard but expand into a gel kind of lump when water is added.
You just mix them into your medium already soaked / expanded.
They just keep moisture levels up.
Not sure if my plants will get big enough to need some coat hanger stiff reinforcing!!
As I wrote above, my equation is thinking:
Heavy yield genetics + below ideal guerilla conditions = medium yields.
I'll stake them though, and prob lst / fim / top a few to keep the stems stiff / strong.
Outdoors the wind will strengthen the stems and laterals anyway, in my experience.
Thank you @tripaholic88 for sharing.