I'm really interested in learning how to put together each element in it's correctly charged state, and how they interact on a molecular level, ie. the ratio's. Which, and when. Learning how to control everything. I think there's much to learn from all of this, if it can be broken down, and analyzed, from a developmental/ratio perspective, then anticipate needs.
I'm not big on keeping logs, fuck that shit. Not happening after so many years documentation 4-8 hrs everyday. I'll learn this crap backwards, I'm intellectually that way anyhow. I'm not going to keep logs period.
I can certainly look at the plant and identify it's developmental stage, then adjust the formula accordingly. It is especially helpful with my perpetual, because I can sorta approximate things on the fly, for slightly different developmental stages. I'm getting there, with aqua's help. I've just got to create every kinda possible problem, so I can correct them... See them at the beginning stages...
Maybe I should do it on purpose, with some small plants, for shits and giggles. Then document it. Now that, would be worth writing down, IMO.