Okay, so I'm the first to admit I'm not an aeroponic expert, but from what I've read and what I know from other activities, I'm going to lay out some basic assumptions and then from those I'll make a few recommendations.
Assumptions:
1. Anything that goes through a fully aeroponic system must be fully dissolved, no solids, period. This helps avoid clogged emitters and buildup on roots.
2. Any nutrient must therefore be fully water soluble, preferably chelated to remain in suspension and be fully available to the roots on contact.
3. Due to the extreme aerobic environment, it's not helpful to have a lot of microbial activity going on, so microbes and mycchorhizae, etc would be counterproductive, lest something end up causing root rot.
Soooo, based on the above assumptions (and if you think any of them are suspect, feel free to point it out), I'd recommend a NON-organic nutrient system, something that fully and completely dissolves. Coincidentally, these are similar conditions to what you might want for an RDWC system, even though the roots in such systems are floating in the water full time.
I use Jacks Hydroponic nutrients, epsom salts, and calcium nitrate. I bet it would work well in your situation, too. BE CERTAIN you start with a very, very low EC dose of whatever you use, since the aeroponic system tends to concentrate nutrient salts on the roots.
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Hope this helps. Let me know what you try, and how it works out for you!
