Seems like the idea behind “organic” is no chemical-based, or factory- produced fertilizers. And it also seems to me that all of the liquids in a hydroponic system would be just that—out of a factory. Although I suppose a guy could run water through a big tank of cow manure or rotted fish and get the hydroponics without the factory’s involvement.
The thing it seems none of the organic earth people seem to understand though is that the plant doesn’t really care if it gets its nitrogen from a dead fish or from out of a plastic bag produced by Phillips Petroleum. Nitrogen is nitrogen.
Aquaponics - growing fish and then filtering the water through the Hydroponics system to clean the nitrates out of the water.
“And it also seems to me that all of the liquids in a hydroponic system would be just that—out of a factory. “
The way it’s done is a bit more sophisticated than “running water” through a tank of cow manure:
“organic fertilizer is degraded into inorganic nutrients by microorganisms in the hydroponic solution via ammonification and nitrification. The microorganisms are cultured with a method of multiple parallel mineralization. The culture solution can be used as the hydroponic solution.”
https://en.wikipedia.org/wiki/Organic_hydroponics