this shit looks awesome, going to have to give it a bigger look tonight.
Hmm, looks good but it's a little hot on the N with no ammonium (im aiming for 3/4 or 4/4 N/K). Ammonium nitrate is dirt cheap an easy to get ahold of, but will of course jack up N levels even higher (at 1g/gal it'll add about 60ppm N, 15ppm NH4, probably 30% more than the mix has now). Hmm ammonium and potassium are also kinda at odds with eachother as far as pH. Adding both of those will make the solution more alkaline unless paired with an acidic anion- nitrate, phosphate, or sulfate (ph down, or paired with one these already as a somewhat neutral salt). And this formula already looks good on N, P and S.
Might just be a bit too high right now, but I'm not sure how you'd add ammonium or potassium without knocking the ph out of balance (assuming its already a ph balanced nute, if its acid as fuck, then you're golden to just add alkaline stuff).
This is one reason why I'm still eyeing the peters hydro special- just need ammonium nitrate and calcium nitrate for me to get to the target... 3(3.5)-1-4-2-0.5-0.5 (elemental! 3-2-4-* NPK), with the target 15ppm NH4. (plus additional cal/mag based on water. I'm still trying to find a simpler recipe lol). But it should balance out neutral- then sulfuric and potassium based up/down for ph control past that. Eventually I'll switch to nitric.
That whole mix also feels really organic. I feel better keeping the organics, if any, as an additive so I can reign it in depending on how the root health is going. But with that said, if this really is going to be live and organic, you're going to get a bunch of extra ammonium from decaying organics and you might not need to add anything.