Your issue here is nutrients. There is a disconnect with the uptake and the feed, while i think its defiantly under fed and needs more N and probably trace. The issue is with coco thats soiless and organics is that its probably most devoid of any bennies with out bennies and a soil food web the nutrients will not be digested and processed never becoming avail and washing out quick. Not only do you need bacteria, fungi, and yeasts but you need catalysts, enzymes, rock dusts to create those reactions. I think your concept could be killer if worked on and honed in upon. Clearly your nutrient program isnt what it needs, you must adapt and find different solution to your feeding. With out changing you will never overcome.
Whats this tea your talking about comprised of?
I think that if the proper bennies were introduced via compost tea from diverse compost sources, and EM to get the right balance going. and you introduced high levels of enzymes via SSTs so that the raw stuff your using can actually be converted into available food for your plant. i think you could get to the point where its the same as salts.
Dont chalk this up to a failed experiment, this can be done its just not common so it will take some time, energy, effort, and thought to dial in.
Aqua said something to me a while back that really opend my eyes; all N is the same when the plant uptakes. It all becomes the same thing....
