It is the best to eat vegetables while they are living and fresh. You pick and then eat. That is the main reason I pursure the act of building an all climate greenhouse in the backyard of our family.
For that matter I first tested a few aquaponics systems. Eventually through test and trial, I have found the simplest and easiest: iAVS sandponice (Mark McMurtry was the one who perfected it).
I made a video showing the two units I built - very crude I know as I was simply testing:
I love it so much that I set up a website in Chinese (well, no time to do the English to Chinese translation):
Gary Donaldson is now the person actively promoting it. Here is his website and it is all in English for sure:
Anyway, this is the system that I will incorporate inside PyraPOD once I set up one in my backyard.